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The shutter aperture may be made larger or smaller by changing the foil area and adjusting the electrical energy input to the foil.
input
{ "name": "input", "sense_definitions_list": [ "signal going into an electronic system", "a statement that expresses a personal opinion or belief or adds information", "any stimulating information or event; acts to arouse action", "a component of production; something that goes into the production o...
[ "signal going into an electronic system" ]
[ "input%1:10:00::" ]
The shutter aperture may be made larger or smaller by changing the foil area and adjusting the electrical energy input to the foil.
foil
{ "name": "foil", "sense_definitions_list": [ "a piece of thin and flexible sheet metal", "anything that serves by contrast to call attention to another thing's good qualities", "a device consisting of a flat or curved piece (as a metal plate) so that its surface reacts to the water it is passing throug...
[ "a piece of thin and flexible sheet metal" ]
[ "foil%1:06:01::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
well-known
{ "name": "well-known", "sense_definitions_list": [ "widely or fully known", "frequently experienced; known closely or intimately" ] }
[ "widely or fully known" ]
[ "well-known%5:00:00:known:00" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
hydrogen
{ "name": "hydrogen", "sense_definitions_list": [ "a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe" ] }
[ "a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe" ]
[ "hydrogen%1:27:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
line
{ "name": "line", "sense_definitions_list": [ "a formation of people or things one beside another", "a mark that is long relative to its width", "a formation of people or things one behind another", "a length (straight or curved) without breadth or thickness; the trace of a moving point", "text ...
[ "a single frequency (or very narrow band) of radiation in a spectrum" ]
[ "line%1:19:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
21
{ "name": "21", "sense_definitions_list": [ "the cardinal number that is the sum of twenty and one", "being one more than twenty" ] }
[ "being one more than twenty" ]
[ "21%5:00:00:cardinal:00" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
cm
{ "name": "cm", "sense_definitions_list": [ "a metric unit of length equal to one hundredth of a meter", "a radioactive transuranic metallic element; produced by bombarding plutonium with helium nuclei" ] }
[ "a metric unit of length equal to one hundredth of a meter" ]
[ "cm%1:23:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
wavelength
{ "name": "wavelength", "sense_definitions_list": [ "the distance (measured in the direction of propagation) between two points in the same phase in consecutive cycles of a wave", "a shared orientation leading to mutual understanding" ] }
[ "the distance (measured in the direction of propagation) between two points in the same phase in consecutive cycles of a wave" ]
[ "wavelength%1:07:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
spectra
{ "name": "spectrum", "sense_definitions_list": [ "an ordered array of the components of an emission or wave", "a broad range of related objects or values or qualities or ideas or activities" ] }
[ "an ordered array of the components of an emission or wave" ]
[ "spectrum%1:19:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
extraterrestrial
{ "name": "extraterrestrial", "sense_definitions_list": [ "a form of life assumed to exist outside the Earth or its atmosphere", "originating or located or occurring outside Earth or its atmosphere" ] }
[ "originating or located or occurring outside Earth or its atmosphere" ]
[ "extraterrestrial%3:01:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
radio sources
{ "name": "radio_source", "sense_definitions_list": [ "an object that radiates radio waves" ] }
[ "an object that radiates radio waves" ]
[ "radio_source%1:17:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
contain
{ "name": "contain", "sense_definitions_list": [ "include or contain; have as a component", "contain or hold; have within", "lessen the intensity of; temper; hold in restraint; hold or keep within limits", "be divisible by", "be capable of holding or containing", "hold back, as of a danger o...
[ "include or contain; have as a component" ]
[ "contain%2:42:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
sharp
{ "name": "sharp", "sense_definitions_list": [ "a musical notation indicating one half step higher than the note named", "a long thin sewing needle with a sharp point", "(of something seen or heard) clearly defined", "ending in a sharp point", "having or demonstrating ability to recognize or dra...
[ "(of something seen or heard) clearly defined" ]
[ "sharp%5:00:00:distinct:00" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
lines
{ "name": "line", "sense_definitions_list": [ "a formation of people or things one beside another", "a mark that is long relative to its width", "a formation of people or things one behind another", "a length (straight or curved) without breadth or thickness; the trace of a moving point", "text ...
[ "a single frequency (or very narrow band) of radiation in a spectrum" ]
[ "line%1:19:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
characteristic
{ "name": "characteristic", "sense_definitions_list": [ "a prominent attribute or aspect of something", "a distinguishing quality", "the integer part (positive or negative) of the representation of a logarithm; in the expression log 643 = 2.808 the characteristic is 2", "any measurable property of a...
[ "typical or distinctive" ]
[ "characteristic%3:00:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
other
{ "name": "other", "sense_definitions_list": [ "not the same one or ones already mentioned or implied; - the White Queen", "recently past", "belonging to the distant past", "very unusual; different in character or quality from the normal or expected; - Lance Morrow" ] }
[ "not the same one or ones already mentioned or implied; - the White Queen" ]
[ "other%3:00:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
atoms
{ "name": "atom", "sense_definitions_list": [ "(physics and chemistry) the smallest component of an element having the chemical properties of the element", "(nontechnical usage) a tiny piece of anything" ] }
[ "(physics and chemistry) the smallest component of an element having the chemical properties of the element" ]
[ "atom%1:27:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
ions
{ "name": "ion", "sense_definitions_list": [ "a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons" ] }
[ "a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons" ]
[ "ion%1:17:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
small
{ "name": "small", "sense_definitions_list": [ "the slender part of the back", "a garment size for a small person", "limited or below average in number or quantity or magnitude or extent", "limited in size or scope", "(of children and animals) young, immature", "slight or limited; especially...
[ "limited or below average in number or quantity or magnitude or extent" ]
[ "small%3:00:00::" ]
Besides the well-known hydrogen line at 21 cm wavelength, the spectra of extraterrestrial radio sources may contain sharp lines characteristic of other atoms, ions, and small molecules.
molecules
{ "name": "molecule", "sense_definitions_list": [ "(physics and chemistry) the simplest structural unit of an element or compound", "(nontechnical usage) a tiny piece of anything" ] }
[ "(physics and chemistry) the simplest structural unit of an element or compound" ]
[ "molecule%1:27:00::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
detection
{ "name": "detection", "sense_definitions_list": [ "the perception that something has occurred or some state exists", "the act of detecting something; catching sight of something", "the detection that a signal is being received", "a police investigation to determine the perpetrator" ] }
[ "the perception that something has occurred or some state exists" ]
[ "detection%1:09:00::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
study
{ "name": "study", "sense_definitions_list": [ "a detailed critical inspection", "applying the mind to learning and understanding a subject (especially by reading)", "a written document describing the findings of some individual or group", "a state of deep mental absorption", "a room used for re...
[ "a detailed critical inspection" ]
[ "study%1:04:00::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
line
{ "name": "line", "sense_definitions_list": [ "a formation of people or things one beside another", "a mark that is long relative to its width", "a formation of people or things one behind another", "a length (straight or curved) without breadth or thickness; the trace of a moving point", "text ...
[ "a single frequency (or very narrow band) of radiation in a spectrum" ]
[ "line%1:19:00::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
spectra
{ "name": "spectrum", "sense_definitions_list": [ "an ordered array of the components of an emission or wave", "a broad range of related objects or values or qualities or ideas or activities" ] }
[ "an ordered array of the components of an emission or wave" ]
[ "spectrum%1:19:00::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
add
{ "name": "add", "sense_definitions_list": [ "a condition (mostly in boys) characterized by behavioral and learning disorders", "make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of", "state or say further", "bestow a quality on", "make an...
[ "make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of" ]
[ "add%2:30:00::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
considerably
{ "name": "considerably", "sense_definitions_list": [ "to a great extent or degree" ] }
[ "to a great extent or degree" ]
[ "considerably%4:02:01::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
present
{ "name": "present", "sense_definitions_list": [ "the period of time that is happening now; any continuous stretch of time including the moment of speech", "something presented as a gift", "a verb tense that expresses actions or states at the time of speaking", "give an exhibition of to an intereste...
[ "temporal sense; intermediate between past and future; now existing or happening or in consideration" ]
[ "present%3:00:01::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
information
{ "name": "information", "sense_definitions_list": [ "a message received and understood", "knowledge acquired through study or experience or instruction", "formal accusation of a crime", "a collection of facts from which conclusions may be drawn", "(communication theory) a numerical measure of t...
[ "a message received and understood" ]
[ "information%1:10:00::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
interstellar
{ "name": "interstellar", "sense_definitions_list": [ "between or among stars" ] }
[ "between or among stars" ]
[ "interstellar%3:01:00::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
gas
{ "name": "gas", "sense_definitions_list": [ "the state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become d...
[ "the state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become distributed uniformly throughout any container" ]
[ "gas%1:26:00::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
clouds
{ "name": "cloud", "sense_definitions_list": [ "any collection of particles (e.g., smoke or dust) or gases that is visible", "a visible mass of water or ice particles suspended at a considerable altitude", "out of touch with reality", "a cause of worry or gloom or trouble", "suspicion affecting ...
[ "any collection of particles (e.g., smoke or dust) or gases that is visible" ]
[ "cloud%1:19:01::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
perhaps
{ "name": "perhaps", "sense_definitions_list": [ "by chance" ] }
[ "by chance" ]
[ "perhaps%4:02:00::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
planetary
{ "name": "planetary", "sense_definitions_list": [ "of or relating to or resembling the physical or orbital characteristics of a planet or the planets", "of or relating to or characteristic of the planet Earth or its inhabitants; - L.C.Eiseley", "having no fixed course", "involving the entire earth;...
[ "of or relating to or resembling the physical or orbital characteristics of a planet or the planets" ]
[ "planetary%3:01:00::" ]
The detection and study of such line spectra would add considerably to present information on interstellar gas clouds and, perhaps, planetary atmospheres.
atmospheres
{ "name": "atmosphere", "sense_definitions_list": [ "a particular environment or surrounding influence", "a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade", "the mass of air surrounding the Earth", "the weather or climate at som...
[ "the mass of air surrounding the Earth" ]
[ "atmosphere%1:15:00::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
most
{ "name": "most", "sense_definitions_list": [ "(superlative of `many' used with count nouns and often preceded by `the') quantifier meaning the greatest in number", "the superlative of `much' that can be used with mass nouns and is usually preceded by `the'; a quantifier meaning the greatest in amount or ex...
[ "used to form the superlative" ]
[ "most%4:02:00::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
likely
{ "name": "likely", "sense_definitions_list": [ "has a good chance of being the case or of coming about", "likely but not certain to be or become true or real", "expected to become or be; in prospect", "within the realm of credibility", "with considerable certainty; without much doubt" ] }
[ "has a good chance of being the case or of coming about" ]
[ "likely%3:00:00::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
producers
{ "name": "producer", "sense_definitions_list": [ "someone who manufactures something", "someone who finds financing for and supervises the making and presentation of a show (play or film or program or similar work)", "something that produces" ] }
[ "something that produces" ]
[ "producer%1:11:00::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
detectable
{ "name": "detectable", "sense_definitions_list": [ "capable of being detected", "easily seen or detected" ] }
[ "capable of being detected" ]
[ "detectable%5:00:00:perceptible:00" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
radio
{ "name": "radio", "sense_definitions_list": [ "medium for communication", "an electronic receiver that detects and demodulates and amplifies transmitted signals", "a communication system based on broadcasting electromagnetic waves", "transmit messages via radio waves", "indicating radiation or ...
[ "medium for communication" ]
[ "radio%1:10:00::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
line
{ "name": "line", "sense_definitions_list": [ "a formation of people or things one beside another", "a mark that is long relative to its width", "a formation of people or things one behind another", "a length (straight or curved) without breadth or thickness; the trace of a moving point", "text ...
[ "a single frequency (or very narrow band) of radiation in a spectrum" ]
[ "line%1:19:00::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
spectra
{ "name": "spectrum", "sense_definitions_list": [ "an ordered array of the components of an emission or wave", "a broad range of related objects or values or qualities or ideas or activities" ] }
[ "an ordered array of the components of an emission or wave" ]
[ "spectrum%1:19:00::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
are
{ "name": "be", "sense_definitions_list": [ "a light strong brittle grey toxic bivalent metallic element", "have the quality of being; (copula, used with an adjective or a predicate noun)", "be identical to; be someone or something", "occupy a certain position or area; be somewhere", "have an ex...
[ "be identical to; be someone or something" ]
[ "be%2:42:06::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
light
{ "name": "light", "sense_definitions_list": [ "(physics) electromagnetic radiation that can produce a visual sensation", "any device serving as a source of illumination", "a particular perspective or aspect of a situation", "the quality of being luminous; emitting or reflecting light", "an illu...
[ "of comparatively little physical weight or density" ]
[ "light%3:00:01::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
diatomic
{ "name": "diatomic", "sense_definitions_list": [ "of or relating to a molecule made up of two atoms" ] }
[ "of or relating to a molecule made up of two atoms" ]
[ "diatomic%3:01:00::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
hydrides
{ "name": "hydride", "sense_definitions_list": [ "any binary compound formed by the union of hydrogen and other elements" ] }
[ "any binary compound formed by the union of hydrogen and other elements" ]
[ "hydride%1:27:00::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
somewhat
{ "name": "somewhat", "sense_definitions_list": [ "to a small degree or extent", "to a moderately sufficient extent or degree" ] }
[ "to a small degree or extent" ]
[ "somewhat%4:02:01::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
less
{ "name": "less", "sense_definitions_list": [ "(comparative of `little' usually used with mass nouns) a quantifier meaning not as great in amount or degree", "(usually preceded by `no') lower in quality", "(nonstandard in some uses but often idiomatic with measure phrases) fewer", "used to form the ...
[ "used to form the comparative of some adjectives and adverbs" ]
[ "less%4:02:00::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
likely
{ "name": "likely", "sense_definitions_list": [ "has a good chance of being the case or of coming about", "likely but not certain to be or become true or real", "expected to become or be; in prospect", "within the realm of credibility", "with considerable certainty; without much doubt" ] }
[ "has a good chance of being the case or of coming about" ]
[ "likely%3:00:00::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
sources
{ "name": "source", "sense_definitions_list": [ "the place where something begins, where it springs into being", "a document (or organization) from which information is obtained", "anything that provides inspiration for later work", "a facility where something is available", "a person who suppli...
[ "the place where something begins, where it springs into being" ]
[ "source%1:15:00::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
are
{ "name": "be", "sense_definitions_list": [ "a light strong brittle grey toxic bivalent metallic element", "have the quality of being; (copula, used with an adjective or a predicate noun)", "be identical to; be someone or something", "occupy a certain position or area; be somewhere", "have an ex...
[ "be identical to; be someone or something" ]
[ "be%2:42:06::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
heavier
{ "name": "heavy", "sense_definitions_list": [ "an actor who plays villainous roles", "a serious (or tragic) role in a play", "of comparatively great physical weight or density", "unusually great in degree or quantity or number", "of the military or industry; using (or being) the heaviest and mo...
[ "of comparatively great physical weight or density" ]
[ "heavy%3:00:01::" ]
Among the most likely producers of detectable radio line spectra are the light diatomic hydrides OH and CH ; somewhat less likely sources are the heavier hydrides SH, SiH, and ScH.
hydrides
{ "name": "hydride", "sense_definitions_list": [ "any binary compound formed by the union of hydrogen and other elements" ] }
[ "any binary compound formed by the union of hydrogen and other elements" ]
[ "hydride%1:27:00::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
Very
{ "name": "very", "sense_definitions_list": [ "precisely as stated", "being the exact same one; not any other:", "used as intensifiers; `real' is sometimes used informally for `really'; `rattling' is informal", "precisely so" ] }
[ "used as intensifiers; `real' is sometimes used informally for `really'; `rattling' is informal" ]
[ "very%4:02:00::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
small
{ "name": "small", "sense_definitions_list": [ "the slender part of the back", "a garment size for a small person", "limited or below average in number or quantity or magnitude or extent", "limited in size or scope", "(of children and animals) young, immature", "slight or limited; especially...
[ "limited or below average in number or quantity or magnitude or extent" ]
[ "small%3:00:00::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
concentrations
{ "name": "concentration", "sense_definitions_list": [ "the strength of a solution; number of molecules of a substance in a given volume", "the spatial property of being crowded together", "strengthening the concentration (as of a solute in a mixture) by removing diluting material", "increase in den...
[ "the strength of a solution; number of molecules of a substance in a given volume" ]
[ "concentration%1:07:02::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
hydrides
{ "name": "hydride", "sense_definitions_list": [ "any binary compound formed by the union of hydrogen and other elements" ] }
[ "any binary compound formed by the union of hydrogen and other elements" ]
[ "hydride%1:27:00::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
be
{ "name": "be", "sense_definitions_list": [ "a light strong brittle grey toxic bivalent metallic element", "have the quality of being; (copula, used with an adjective or a predicate noun)", "be identical to; be someone or something", "occupy a certain position or area; be somewhere", "have an ex...
[ "have the quality of being; (copula, used with an adjective or a predicate noun)" ]
[ "be%2:42:03::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
detectable
{ "name": "detectable", "sense_definitions_list": [ "capable of being detected", "easily seen or detected" ] }
[ "capable of being detected" ]
[ "detectable%5:00:00:perceptible:00" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
interstellar
{ "name": "interstellar", "sense_definitions_list": [ "between or among stars" ] }
[ "between or among stars" ]
[ "interstellar%3:01:00::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
gas
{ "name": "gas", "sense_definitions_list": [ "the state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become d...
[ "the state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become distributed uniformly throughout any container" ]
[ "gas%1:26:00::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
concentrations
{ "name": "concentration", "sense_definitions_list": [ "the strength of a solution; number of molecules of a substance in a given volume", "the spatial property of being crowded together", "strengthening the concentration (as of a solute in a mixture) by removing diluting material", "increase in den...
[ "the strength of a solution; number of molecules of a substance in a given volume" ]
[ "concentration%1:07:02::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
as
{ "name": "as", "sense_definitions_list": [ "a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar", "a United States territory on the eastern part of the isl...
[ "to the same degree (often followed by `as')" ]
[ "as%4:02:00::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
low
{ "name": "low", "sense_definitions_list": [ "an air mass of lower pressure; often brings precipitation", "British political cartoonist (born in New Zealand) who created the character Colonel Blimp (1891-1963)", "a low level or position or degree", "the lowest forward gear ratio in the gear box of a...
[ "less than normal in degree or intensity or amount" ]
[ "low%3:00:02::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
molecules
{ "name": "molecule", "sense_definitions_list": [ "(physics and chemistry) the simplest structural unit of an element or compound", "(nontechnical usage) a tiny piece of anything" ] }
[ "(physics and chemistry) the simplest structural unit of an element or compound" ]
[ "molecule%1:27:00::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
be
{ "name": "be", "sense_definitions_list": [ "a light strong brittle grey toxic bivalent metallic element", "have the quality of being; (copula, used with an adjective or a predicate noun)", "be identical to; be someone or something", "occupy a certain position or area; be somewhere", "have an ex...
[ "have the quality of being; (copula, used with an adjective or a predicate noun)" ]
[ "be%2:42:03::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
sufficient
{ "name": "sufficient", "sense_definitions_list": [ "of a quantity that can fulfill a need or requirement but without being abundant" ] }
[ "of a quantity that can fulfill a need or requirement but without being abundant" ]
[ "sufficient%3:00:00::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
compared
{ "name": "compare", "sense_definitions_list": [ "qualities that are comparable", "examine and note the similarities or differences of", "be comparable", "consider or describe as similar, equal, or analogous", "to form the comparative or superlative form on an adjective or adverb" ] }
[ "consider or describe as similar, equal, or analogous" ]
[ "compare%2:31:01::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
hydrogen atoms
{ "name": "hydrogen_atom", "sense_definitions_list": [ "an atom of hydrogen" ] }
[ "an atom of hydrogen" ]
[ "hydrogen_atom%1:27:00::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
required
{ "name": "require", "sense_definitions_list": [ "require as useful, just, or proper", "consider obligatory; request and expect", "make someone do something", "have need of" ] }
[ "require as useful, just, or proper" ]
[ "require%2:42:00::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
detection
{ "name": "detection", "sense_definitions_list": [ "the perception that something has occurred or some state exists", "the act of detecting something; catching sight of something", "the detection that a signal is being received", "a police investigation to determine the perpetrator" ] }
[ "the perception that something has occurred or some state exists" ]
[ "detection%1:09:00::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
21
{ "name": "21", "sense_definitions_list": [ "the cardinal number that is the sum of twenty and one", "being one more than twenty" ] }
[ "being one more than twenty" ]
[ "21%5:00:00:cardinal:00" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
cm
{ "name": "cm", "sense_definitions_list": [ "a metric unit of length equal to one hundredth of a meter", "a radioactive transuranic metallic element; produced by bombarding plutonium with helium nuclei" ] }
[ "a metric unit of length equal to one hundredth of a meter" ]
[ "cm%1:23:00::" ]
Very small concentrations of these hydrides should be detectable ; in interstellar gas, concentrations as low as * * f molecules / * * f may be sufficient, as compared to the * * f hydrogen atoms * * f required for detection of the 21 - cm line.
line
{ "name": "line", "sense_definitions_list": [ "a formation of people or things one beside another", "a mark that is long relative to its width", "a formation of people or things one behind another", "a length (straight or curved) without breadth or thickness; the trace of a moving point", "text ...
[ "a single frequency (or very narrow band) of radiation in a spectrum" ]
[ "line%1:19:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
High
{ "name": "high", "sense_definitions_list": [ "a lofty level or position or degree", "an air mass of higher than normal pressure", "a state of sustained elation", "a state of altered consciousness induced by alcohol or narcotics", "a high place", "a public secondary school usually including ...
[ "greater than normal in degree or intensity or amount" ]
[ "high%3:00:02::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
sensitivity
{ "name": "sensitivity", "sense_definitions_list": [ "(physiology) responsiveness to external stimuli; the faculty of sensation", "the ability to respond to physical stimuli or to register small physical amounts or differences", "sensitivity to emotional feelings (of self and others)", "susceptibili...
[ "(physiology) responsiveness to external stimuli; the faculty of sensation" ]
[ "sensitivity%1:09:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
radio telescopes
{ "name": "radio_telescope", "sense_definitions_list": [ "astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extraterrestrial sources" ] }
[ "astronomical telescope that picks up electromagnetic radiations in the radio-frequency range from extraterrestrial sources" ]
[ "radio_telescope%1:06:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
achieved
{ "name": "achieve", "sense_definitions_list": [ "to gain with effort" ] }
[ "to gain with effort" ]
[ "achieve%2:41:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
reducing
{ "name": "reduce", "sense_definitions_list": [ "cut down on; make a reduction in", "make less complex", "bring to humbler or weaker state or condition", "simplify the form of a mathematical equation of expression by substituting one term for another", "lower in grade or rank or force somebody i...
[ "cut down on; make a reduction in" ]
[ "reduce%2:30:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
bandwidth
{ "name": "bandwidth", "sense_definitions_list": [ "a data transmission rate; the maximum amount of information (bits/second) that can be transmitted along a channel" ] }
[ "a data transmission rate; the maximum amount of information (bits/second) that can be transmitted along a channel" ]
[ "bandwidth%1:23:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
receiver
{ "name": "receiver", "sense_definitions_list": [ "set that receives radio or tv signals", "(law) a person (usually appointed by a court of law) who liquidates assets or preserves them for the benefit of affected parties", "earphone that converts electrical signals into sounds", "a person who receiv...
[ "set that receives radio or tv signals" ]
[ "receiver%1:06:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
therefore
{ "name": "therefore", "sense_definitions_list": [ "(used to introduce a logical conclusion) from that fact or reason or as a result", "as a consequence" ] }
[ "(used to introduce a logical conclusion) from that fact or reason or as a result" ]
[ "therefore%4:02:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
only
{ "name": "only", "sense_definitions_list": [ "being the only one; single and isolated from others", "exclusive of anyone or anything else", "and nothing more", "without any others being included or involved", "with nevertheless the final result", "in the final outcome", "except that", ...
[ "without any others being included or involved" ]
[ "only%4:02:01::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
precise
{ "name": "precise", "sense_definitions_list": [ "sharply exact or accurate or delimited", "(of ideas, images, representations, expressions) characterized by perfect conformity to fact or truth ; strictly correct" ] }
[ "(of ideas, images, representations, expressions) characterized by perfect conformity to fact or truth ; strictly correct" ]
[ "precise%5:00:00:correct:00" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
foreknowledge
{ "name": "foreknowledge", "sense_definitions_list": [ "knowledge of an event before it occurs" ] }
[ "knowledge of an event before it occurs" ]
[ "foreknowledge%1:10:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
line
{ "name": "line", "sense_definitions_list": [ "a formation of people or things one beside another", "a mark that is long relative to its width", "a formation of people or things one behind another", "a length (straight or curved) without breadth or thickness; the trace of a moving point", "text ...
[ "a single frequency (or very narrow band) of radiation in a spectrum" ]
[ "line%1:19:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
frequencies
{ "name": "frequency", "sense_definitions_list": [ "the number of occurrences within a given time period", "the ratio of the number of observations in a statistical category to the total number of observations", "the number of observations in a given statistical category" ] }
[ "the number of occurrences within a given time period" ]
[ "frequency%1:28:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
is
{ "name": "be", "sense_definitions_list": [ "a light strong brittle grey toxic bivalent metallic element", "have the quality of being; (copula, used with an adjective or a predicate noun)", "be identical to; be someone or something", "occupy a certain position or area; be somewhere", "have an ex...
[ "have the quality of being; (copula, used with an adjective or a predicate noun)" ]
[ "be%2:42:03::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
astronomical
{ "name": "astronomical", "sense_definitions_list": [ "relating or belonging to the science of astronomy", "inconceivably large" ] }
[ "relating or belonging to the science of astronomy" ]
[ "astronomical%3:01:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
search
{ "name": "search", "sense_definitions_list": [ "the activity of looking thoroughly in order to find something or someone", "an investigation seeking answers", "an operation that determines whether one or more of a set of items has a specified property", "the examination of alternative hypotheses", ...
[ "an investigation seeking answers" ]
[ "search%1:04:02::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
radio spectra
{ "name": "radio_spectrum", "sense_definitions_list": [ "the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television" ] }
[ "the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television" ]
[ "radio_spectrum%1:19:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
molecules
{ "name": "molecule", "sense_definitions_list": [ "(physics and chemistry) the simplest structural unit of an element or compound", "(nontechnical usage) a tiny piece of anything" ] }
[ "(physics and chemistry) the simplest structural unit of an element or compound" ]
[ "molecule%1:27:00::" ]
High sensitivity in radio telescopes is achieved by reducing the bandwidth of the receiver ; therefore, only with precise foreknowledge of the line frequencies is an astronomical search for the radio spectra of these molecules feasible.
feasible
{ "name": "feasible", "sense_definitions_list": [ "capable of being done with means at hand and circumstances as they are" ] }
[ "capable of being done with means at hand and circumstances as they are" ]
[ "feasible%5:00:00:possible:00" ]
To secure precise measurements of these frequencies, a research program in free radical microwave spectroscopy has been started.
secure
{ "name": "secure", "sense_definitions_list": [ "get by special effort", "cause to be firmly attached", "assure payment of", "make certain of", "fill or close tightly with or as if with a plug", "furnish with battens", "free from fear or doubt; easy in mind", "free from danger or ris...
[ "get by special effort" ]
[ "secure%2:40:00::" ]
To secure precise measurements of these frequencies, a research program in free radical microwave spectroscopy has been started.
precise
{ "name": "precise", "sense_definitions_list": [ "sharply exact or accurate or delimited", "(of ideas, images, representations, expressions) characterized by perfect conformity to fact or truth ; strictly correct" ] }
[ "sharply exact or accurate or delimited" ]
[ "precise%3:00:00::" ]
To secure precise measurements of these frequencies, a research program in free radical microwave spectroscopy has been started.
frequencies
{ "name": "frequency", "sense_definitions_list": [ "the number of occurrences within a given time period", "the ratio of the number of observations in a statistical category to the total number of observations", "the number of observations in a given statistical category" ] }
[ "the number of occurrences within a given time period" ]
[ "frequency%1:28:00::" ]
To secure precise measurements of these frequencies, a research program in free radical microwave spectroscopy has been started.
research
{ "name": "research", "sense_definitions_list": [ "systematic investigation to establish facts", "a search for knowledge", "attempt to find out in a systematically and scientific manner", "inquire into" ] }
[ "systematic investigation to establish facts" ]
[ "research%1:04:00::" ]
To secure precise measurements of these frequencies, a research program in free radical microwave spectroscopy has been started.
program
{ "name": "program", "sense_definitions_list": [ "a series of steps to be carried out or goals to be accomplished", "a system of projects or services intended to meet a public need", "a radio or television show", "a document stating the aims and principles of a political party", "an announcement...
[ "a series of steps to be carried out or goals to be accomplished" ]
[ "program%1:09:00::" ]
To secure precise measurements of these frequencies, a research program in free radical microwave spectroscopy has been started.
free radical
{ "name": "free_radical", "sense_definitions_list": [ "an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule" ] }
[ "an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule" ]
[ "free_radical%1:27:00::" ]
To secure precise measurements of these frequencies, a research program in free radical microwave spectroscopy has been started.
microwave
{ "name": "microwave", "sense_definitions_list": [ "a short electromagnetic wave (longer than infrared but shorter than radio waves); used for radar and microwave ovens and for transmitting telephone, facsimile, video and data", "kitchen appliance that cooks food by passing an electromagnetic wave through i...
[ "a short electromagnetic wave (longer than infrared but shorter than radio waves); used for radar and microwave ovens and for transmitting telephone, facsimile, video and data" ]
[ "microwave%1:19:00::" ]
To secure precise measurements of these frequencies, a research program in free radical microwave spectroscopy has been started.
spectroscopy
{ "name": "spectroscopy", "sense_definitions_list": [ "the use of spectroscopes to analyze spectra" ] }
[ "the use of spectroscopes to analyze spectra" ]
[ "spectroscopy%1:04:00::" ]