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472293 | https://en.wikipedia.org/wiki/Yolk | Yolk | Among animals which produce eggs, the yolk (; also known as the vitellus) is the nutrient-bearing portion of the egg whose primary function is to supply food for the development of the embryo. Some types of egg contain no yolk, for example because they are laid in situations where the food supply is sufficient (such a... | Biology and health sciences | Animal reproduction | Biology |
472479 | https://en.wikipedia.org/wiki/Scutigera%20coleoptrata | Scutigera coleoptrata | Scutigera coleoptrata, also known as the house centipede, is a species of centipede that is typically yellowish-grey and has up to 15 pairs of long legs. Originating in the Mediterranean region, it has spread to other parts of the world, where it can live in human homes. It is an insectivore; it kills and eats other ar... | Biology and health sciences | Myriapoda | Animals |
472608 | https://en.wikipedia.org/wiki/Depressant | Depressant | Depressants, colloquially known as "downers" or central nervous system (CNS) depressants, are drugs that lower neurotransmission levels, decrease the electrical activity of brain cells, or reduce arousal or stimulation in various areas of the brain. Some specific depressants do influence mood, either positively (e.g., ... | Biology and health sciences | General concepts_2 | Health |
472640 | https://en.wikipedia.org/wiki/Flying%20fish | Flying fish | The Exocoetidae are a family of marine ray-finned fish in the order Beloniformes, known colloquially as flying fish or flying cod. About 64 species are grouped in seven genera. While they don't "fly" in the same way a bird does, flying fish can make powerful, self-propelled leaps out of the water where their long wing-... | Biology and health sciences | Fishes | null |
472645 | https://en.wikipedia.org/wiki/Video%20camera | Video camera | A video camera is an optical instrument that captures videos, as opposed to a movie camera, which records images on film. Video cameras were initially developed for the television industry but have since become widely used for a variety of other purposes.
Video cameras are used primarily in two modes. The first, chara... | Technology | Media and communication | null |
472786 | https://en.wikipedia.org/wiki/Quercus%20virginiana | Quercus virginiana | Quercus virginiana, also known as the southern live oak, is an evergreen oak tree endemic to the Southeastern United States. Though many other species are loosely called live oak, the southern live oak is particularly iconic of the Old South. Many very large and old specimens of live oak can be found today in the Deep ... | Biology and health sciences | Fagales | Plants |
472877 | https://en.wikipedia.org/wiki/Prior%20probability | Prior probability | A prior probability distribution of an uncertain quantity, simply called the prior, is its assumed probability distribution before some evidence is taken into account. For example, the prior could be the probability distribution representing the relative proportions of voters who will vote for a particular politician i... | Mathematics | Statistics | null |
473046 | https://en.wikipedia.org/wiki/Primulaceae | Primulaceae | The Primulaceae ( ), commonly known as the primrose family (but not related to the evening primrose family), are a family of herbaceous and woody flowering plants including some favourite garden plants and wildflowers. Most are perennial though some species, such as scarlet pimpernel, are annuals.
Previously one of th... | Biology and health sciences | Ericales | null |
473326 | https://en.wikipedia.org/wiki/Poise%20%28unit%29 | Poise (unit) | The poise (symbol P; ) is the unit of dynamic viscosity (absolute viscosity) in the centimetre–gram–second system of units (CGS). It is named after Jean Léonard Marie Poiseuille (see Hagen–Poiseuille equation). The centipoise (1 cP = 0.01 P) is more commonly used than the poise itself.
Dynamic viscosity has dimensions... | Physical sciences | Viscosity | Basics and measurement |
473493 | https://en.wikipedia.org/wiki/Quercus%20macrocarpa | Quercus macrocarpa | Quercus macrocarpa, the bur oak or burr oak, is a species of oak tree native to eastern North America. It is in the white oak section, Quercus sect. Quercus, and is also called mossycup oak, mossycup white oak, blue oak, or scrub oak. The acorns are the largest of any North American oak (thus the species name macrocarp... | Biology and health sciences | Fagales | Plants |
473514 | https://en.wikipedia.org/wiki/Generalized%20coordinates | Generalized coordinates | In analytical mechanics, generalized coordinates are a set of parameters used to represent the state of a system in a configuration space. These parameters must uniquely define the configuration of the system relative to a reference state. The generalized velocities are the time derivatives of the generalized coordinat... | Physical sciences | Classical mechanics | Physics |
473979 | https://en.wikipedia.org/wiki/Mutually%20orthogonal%20Latin%20squares | Mutually orthogonal Latin squares | In combinatorics, two Latin squares of the same size (order) are said to be orthogonal if when superimposed the ordered paired entries in the positions are all distinct. A set of Latin squares, all of the same order, all pairs of which are orthogonal is called a set of mutually orthogonal Latin squares. This concept of... | Mathematics | Combinatorics | null |
474119 | https://en.wikipedia.org/wiki/Rhamphorhynchus | Rhamphorhynchus | Rhamphorhynchus (, from Ancient Greek rhamphos meaning "beak" and rhynchus meaning "snout") is a genus of long-tailed pterosaurs in the Jurassic period. Less specialized than contemporary, short-tailed pterodactyloid pterosaurs such as Pterodactylus, it had a long tail, stiffened with ligaments, which ended in a charac... | Biology and health sciences | Pterosaurs | Animals |
474404 | https://en.wikipedia.org/wiki/High-pressure%20area | High-pressure area | A high-pressure area, high, or anticyclone, is an area near the surface of a planet where the atmospheric pressure is greater than the pressure in the surrounding regions. Highs are middle-scale meteorological features that result from interplays between the relatively larger-scale dynamics of an entire planet's atmosp... | Physical sciences | Atmospheric circulation | null |
3543585 | https://en.wikipedia.org/wiki/Joule-second | Joule-second | The joule-second (symbol J⋅s or J s) is the unit of action and of angular momentum in the International System of Units (SI) equal to the product of an SI derived unit, the joule (J), and an SI base unit, the second (s). The joule-second is a unit of action or of angular momentum. The joule-second also appears in quant... | Physical sciences | Energy | Basics and measurement |
3546942 | https://en.wikipedia.org/wiki/Domestic%20pigeon | Domestic pigeon | The domestic pigeon (Columba livia domestica or Columba livia forma domestica) is a pigeon subspecies that was derived from the rock dove or rock pigeon. The rock pigeon is the world's oldest domesticated bird. Mesopotamian cuneiform tablets mention the domestication of pigeons more than 5,000 years ago, as do Egyptia... | Biology and health sciences | Pigeons | Animals |
4771644 | https://en.wikipedia.org/wiki/Necturus | Necturus | Necturus is a genus of aquatic salamanders in the family Proteidae. Species of the genus are native to the eastern United States and Canada. They are commonly known as waterdogs and mudpuppies. The common mudpuppy (N. maculosus) is probably the best-known species – as an amphibian with gill slits, it is often dissected... | Biology and health sciences | Salamanders and newts | Animals |
4774419 | https://en.wikipedia.org/wiki/Herpes%20simplex%20virus | Herpes simplex virus | Herpes simplex virus 1 (cold sores) and 2 (genital herpes) (HSV-1 and HSV-2), also known by their taxonomic names Human alphaherpesvirus 1 and Human alphaherpesvirus 2, are two members of the human Herpesviridae family, a set of viruses that produce viral infections in the majority of humans. Both HSV-1 and HSV-2 are v... | Biology and health sciences | Specific viruses | Health |
23836476 | https://en.wikipedia.org/wiki/Hypocarnivore | Hypocarnivore | A hypocarnivore is an animal that consumes less than 30% meat for its diet, the majority of which consists of fungi, fruits, and other plant material. Examples of living hypocarnivores are the grizzly bear (Ursus horribilis), black bear (Ursus americanus), binturong (Arctictis binturong) and kinkajou (Potos flavus)
T... | Biology and health sciences | Ethology | Biology |
23836952 | https://en.wikipedia.org/wiki/Mesocarnivore | Mesocarnivore | A mesocarnivore is an animal whose diet consists of 30–70% meat with the balance consisting of non-vertebrate foods which may include insects, fungi, fruits, other plant material and any food that is available to them. Mesocarnivores are from a large family group of mammalian carnivores and vary from small to medium si... | Biology and health sciences | Ethology | Biology |
23837739 | https://en.wikipedia.org/wiki/International%20Prototype%20of%20the%20Kilogram | International Prototype of the Kilogram | The International Prototype of the Kilogram (referred to by metrologists as the IPK or Le Grand K; sometimes called the ur-kilogram, or urkilogram, particularly by German-language authors writing in English:30) is an object whose mass was used to define the kilogram from 1889, when it replaced the Kilogramme des Archiv... | Physical sciences | Measurement systems | Basics and measurement |
10614384 | https://en.wikipedia.org/wiki/Platypterygius | Platypterygius | Platypterygius is a historically paraphyletic genus of platypterygiine ichthyosaur from the Cretaceous period. It was historically used as a wastebasket taxon, and most species within Platypterygius likely are undiagnostic at the genus or species level, or represent distinct genera, even being argued as invalid. While ... | Biology and health sciences | Prehistoric marine reptiles | Animals |
10618229 | https://en.wikipedia.org/wiki/Bowstring | Bowstring | A bowstring joins the two ends of the bow stave and launches the arrow. Desirable properties include light weight, strength, resistance to abrasion, and resistance to water. Mass has most effect at the center of the string; of extra mass in the middle of the string slows the arrow about as much as at the ends.
Strin... | Technology | Archery | null |
10624594 | https://en.wikipedia.org/wiki/Krypton | Krypton | Krypton (from 'the hidden one') is a chemical element; it has symbol Kr and atomic number 36. It is a colorless, odorless noble gas that occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. Krypton is chemically inert.
Krypton, like the other noble gases, is used in ... | Physical sciences | Chemical elements_2 | null |
19666626 | https://en.wikipedia.org/wiki/Lemming | Lemming | A lemming is a small rodent, usually found in or near the Arctic in tundra biomes. Lemmings form the subfamily Arvicolinae (also known as Microtinae) together with voles and muskrats, which form part of the superfamily Muroidea, which also includes rats, mice, hamsters and gerbils. A longstanding myth holds that they e... | Biology and health sciences | Rodents | Animals |
19673093 | https://en.wikipedia.org/wiki/Matter | Matter | In classical physics and general chemistry, matter is any substance that has mass and takes up space by having volume. All everyday objects that can be touched are ultimately composed of atoms, which are made up of interacting subatomic particles, and in everyday as well as scientific usage, matter generally includes a... | Physical sciences | Physics | null |
12873937 | https://en.wikipedia.org/wiki/Bleach | Bleach | Bleach is the generic name for any chemical product that is used industrially or domestically to remove color from (i.e. to whiten) fabric or fiber (in a process called bleaching) or to disinfect after cleaning. It often refers specifically to a dilute solution of sodium hypochlorite, also called "liquid bleach".
Many... | Technology | Food, water and health | null |
23672379 | https://en.wikipedia.org/wiki/Agricultural%20machinery | Agricultural machinery | Agricultural machinery relates to the mechanical structures and devices used in farming or other agriculture. There are many types of such equipment, from hand tools and power tools to tractors and the farm implements that they tow or operate. Machinery is used in both organic and nonorganic farming. Especially since t... | Technology | Basics_2 | null |
23672633 | https://en.wikipedia.org/wiki/Wattle%20and%20daub | Wattle and daub | Wattle and daub is a composite building method used for making walls and buildings, in which a woven lattice of wooden strips called "wattle" is "daubed" with a sticky material usually made of some combination of wet soil, clay, sand, and straw. Wattle and daub has been used for at least 6,000 years and is still an im... | Technology | Building materials | null |
18600440 | https://en.wikipedia.org/wiki/Osmosis | Osmosis | Osmosis (, ) is the spontaneous net movement or diffusion of solvent molecules through a selectively-permeable membrane from a region of high water potential (region of lower solute concentration) to a region of low water potential (region of higher solute concentration), in the direction that tends to equalize the sol... | Physical sciences | Fluid mechanics | null |
18600477 | https://en.wikipedia.org/wiki/Hiccup | Hiccup | A hiccup (scientific name singultus, from Latin for "sob, hiccup"; also spelled hiccough) is an involuntary contraction (myoclonic jerk) of the diaphragm that may repeat several times per minute. The hiccup is an involuntary action involving a reflex arc. Once triggered, the reflex causes a strong contraction of the di... | Biology and health sciences | Symptoms and signs | Health |
18600953 | https://en.wikipedia.org/wiki/Shield%20mantis | Shield mantis | Shield mantis, hood mantis (or hooded mantis) and leaf mantis (or leafy mantis) are common names for certain praying mantises with an extended thorax aiding it in camouflage and leaf mimicry. The terms are used for species in the following genera:
Asiadodis
Choeradodis
Rhombodera
Tamolanica
| Biology and health sciences | Insects: General | Animals |
18600991 | https://en.wikipedia.org/wiki/Raccoon | Raccoon | The raccoon ( or , Procyon lotor), also spelled racoon and sometimes called the common raccoon or northern raccoon to distinguish it from the other species, is a mammal native to North America. It is the largest of the procyonid family, having a body length of , and a body weight of . Its grayish coat mostly consists o... | Biology and health sciences | Procyonidae | Animals |
18603849 | https://en.wikipedia.org/wiki/Leech | Leech | Leeches are segmented parasitic or predatory worms that comprise the subclass Hirudinea within the phylum Annelida. They are closely related to the oligochaetes, which include the earthworm, and like them have soft, muscular segmented bodies that can lengthen and contract. Both groups are hermaphrodites and have a clit... | Biology and health sciences | Lophotrochozoa | null |
790967 | https://en.wikipedia.org/wiki/Hepatitis%20C%20virus | Hepatitis C virus | The hepatitis C virus (HCV) is a small (55–65 nm in size), enveloped, positive-sense single-stranded RNA virus of the family Flaviviridae. The hepatitis C virus is the cause of hepatitis C and some cancers such as liver cancer (hepatocellular carcinoma, abbreviated HCC) and lymphomas in humans.
Taxonomy
The hepatitis ... | Biology and health sciences | Specific viruses | Health |
792246 | https://en.wikipedia.org/wiki/Square%20Kilometre%20Array | Square Kilometre Array | The Square Kilometre Array (SKA) is an intergovernmental international radio telescope project being built in Australia (low-frequency) and South Africa (mid-frequency). The combining infrastructure, the Square Kilometre Array Observatory (SKAO), and headquarters, are located at the Jodrell Bank Observatory in the Unit... | Technology | Ground-based observatories | null |
793565 | https://en.wikipedia.org/wiki/Highland | Highland | Highlands or uplands are areas of high elevation such as a mountainous region, elevated mountainous plateau or high hills. Generally, upland refers to a range of hills, typically from up to , while highland is usually reserved for ranges of low mountains. However, the two terms are interchangeable and also include reg... | Physical sciences | Landforms: General | Earth science |
793635 | https://en.wikipedia.org/wiki/Eoarchean | Eoarchean | The Eoarchean ( ; also spelled Eoarchaean) is the first era of the Archean Eon of the geologic record. It spans 431 million years, from the end of the Hadean Eon 4031 Mya to the start of the Paleoarchean Era 3600 Mya.
Some estimates place the beginnings of life on Earth in this era, while others place it earlier. Evid... | Physical sciences | Geological timescale | Earth science |
793825 | https://en.wikipedia.org/wiki/Goose%20bumps | Goose bumps | Goose bumps, goosebumps or goose pimples (also called chill bumps) are the bumps on a person's skin at the base of body hairs which may involuntarily develop when a person is tickled, cold or experiencing strong emotions such as fear, euphoria or sexual arousal.
The formation of goose bumps in humans under stress is c... | Biology and health sciences | Symptoms and signs | Health |
793975 | https://en.wikipedia.org/wiki/Horizontal%20branch | Horizontal branch | The horizontal branch (HB) is a stage of stellar evolution that immediately follows the red-giant branch in stars whose masses are similar to the Sun's. Horizontal-branch stars are powered by helium fusion in the core (via the triple-alpha process) and by hydrogen fusion (via the CNO cycle) in a shell surrounding the c... | Physical sciences | Stellar astronomy | Astronomy |
794439 | https://en.wikipedia.org/wiki/Sodium%20sulfate | Sodium sulfate | Sodium sulfate (also known as sodium sulphate or sulfate of soda) is the inorganic compound with formula Na2SO4 as well as several related hydrates. All forms are white solids that are highly soluble in water. With an annual production of 6 million tonnes, the decahydrate is a major commodity chemical product. It is ma... | Physical sciences | Salts | null |
795199 | https://en.wikipedia.org/wiki/Breast%20milk | Breast milk | Breast milk (sometimes spelled as breastmilk) or mother's milk is milk produced by the mammary glands in the breasts of women. Breast milk is the primary source of nutrition for newborn infants, comprising fats, proteins, carbohydrates, and a varying composition of minerals and vitamins. Breast milk also contains subst... | Biology and health sciences | Health and fitness: General | Health |
795334 | https://en.wikipedia.org/wiki/Dislocation | Dislocation | In materials science, a dislocation or Taylor's dislocation is a linear crystallographic defect or irregularity within a crystal structure that contains an abrupt change in the arrangement of atoms. The movement of dislocations allow atoms to slide over each other at low stress levels and is known as glide or slip. The... | Physical sciences | Crystallography | Physics |
795403 | https://en.wikipedia.org/wiki/Messier%2081 | Messier 81 | Messier 81 (also known as NGC 3031 or Bode's Galaxy) is a grand design spiral galaxy about 12 million light-years away in the constellation Ursa Major. It has a D25 isophotal diameter of . Because of its relative proximity to the Milky Way galaxy, large size, and active galactic nucleus (which harbors a 70 million
sup... | Physical sciences | Notable galaxies | Astronomy |
795422 | https://en.wikipedia.org/wiki/Lipizzan | Lipizzan | The Lipizzan or Lipizzaner (, , , , , , ) is a European breed of riding horse developed in the Habsburg Empire in the sixteenth century. It is of Baroque type, and is powerful, slow to mature and long-lived; the coat is usually gray.
The name of the breed derives from that of the village of Lipica (), which was part ... | Biology and health sciences | Horses | Animals |
6243993 | https://en.wikipedia.org/wiki/LU%20decomposition | LU decomposition | In numerical analysis and linear algebra, lower–upper (LU) decomposition or factorization factors a matrix as the product of a lower triangular matrix and an upper triangular matrix (see matrix decomposition). The product sometimes includes a permutation matrix as well. LU decomposition can be viewed as the matrix form... | Mathematics | Linear algebra | null |
6244916 | https://en.wikipedia.org/wiki/Spectral%20energy%20distribution | Spectral energy distribution | A spectral energy distribution (SED) is a plot of energy versus frequency or wavelength of light (not to be confused with a 'spectrum' of flux density vs frequency or wavelength). It is used in many branches of astronomy to characterize astronomical sources. For example, in radio astronomy they are used to show the e... | Physical sciences | Basics | Astronomy |
6245046 | https://en.wikipedia.org/wiki/Spectral%20index | Spectral index | In astronomy, the spectral index of a source is a measure of the dependence of radiative flux density (that is, radiative flux per unit of frequency) on frequency. Given frequency in Hz and radiative flux density in Jy, the spectral index is given implicitly by
Note that if flux does not follow a power law in frequ... | Physical sciences | Radio astronomy | Astronomy |
12877273 | https://en.wikipedia.org/wiki/Testing%20cosmetics%20on%20animals | Testing cosmetics on animals | Cosmetic testing on animals is a type of animal testing used to test the safety and hypoallergenic properties of cosmetic products for use by humans.
Since this type of animal testing is often harmful to the animal subjects, it is opposed by animal rights activists and others. Cosmetic animal testing is banned in many... | Physical sciences | Research methods | Basics and measurement |
12877572 | https://en.wikipedia.org/wiki/Fan%20%28machine%29 | Fan (machine) | A fan is a powered machine that creates airflow. A fan consists of rotating vanes or blades, generally made of wood, plastic, or metal, which act on the air. The rotating assembly of blades and hub is known as an impeller, rotor, or runner. Usually, it is contained within some form of housing, or case. This may direct ... | Technology | Heating and cooling | null |
12878756 | https://en.wikipedia.org/wiki/Lake%20island | Lake island | A lake island is any landmass within a lake. It is a type of inland island. Lake islands may form a lake archipelago.
Formation
Lake islands may form in numerous ways. They may occur through a build-up of sedimentation as shoals, and become true islands through changes in the level of the lake. They may have been or... | Physical sciences | Oceanic and coastal landforms | Earth science |
19681430 | https://en.wikipedia.org/wiki/Earthworm | Earthworm | An earthworm is a soil-dwelling terrestrial invertebrate that belongs to the phylum Annelida. The term is the common name for the largest members of the class (or subclass, depending on the author) Oligochaeta. In classical systems, they were in the order of Opisthopora since the male pores opened posterior to the fema... | Biology and health sciences | Lophotrochozoa | null |
19681795 | https://en.wikipedia.org/wiki/Caranx | Caranx | Caranx is a genus of tropical to subtropical marine fishes in the jack family Carangidae, commonly known as jacks, trevallies and kingfishes. They are moderate- to large-sized, deep-bodied fishes which are distinguished from other carangid genera by specific gill raker, fin ray and dentition characteristics. The genus ... | Biology and health sciences | Acanthomorpha | Animals |
8240558 | https://en.wikipedia.org/wiki/Line%E2%80%93line%20intersection | Line–line intersection | In Euclidean geometry, the intersection of a line and a line can be the empty set, a point, or another line. Distinguishing these cases and finding the intersection have uses, for example, in computer graphics, motion planning, and collision detection.
In three-dimensional Euclidean geometry, if two lines are not in t... | Mathematics | Two-dimensional space | null |
4779861 | https://en.wikipedia.org/wiki/Pouched%20lamprey | Pouched lamprey | The pouched lamprey (Geotria australis), also known as the piharau in New Zealand's North Island, korokoro, kanakana in the South Island, or wide-mouthed lamprey, is a species in the genus Geotria, which is the only genus in the family Geotriidae. The second species in the genus is the Argentinian lamprey (Geotria macr... | Biology and health sciences | Agnatha | Animals |
1871162 | https://en.wikipedia.org/wiki/Spin%E2%80%93orbit%20interaction | Spin–orbit interaction | In quantum mechanics, the spin–orbit interaction (also called spin–orbit effect or spin–orbit coupling) is a relativistic interaction of a particle's spin with its motion inside a potential. A key example of this phenomenon is the spin–orbit interaction leading to shifts in an electron's atomic energy levels, due to e... | Physical sciences | Atomic physics | Physics |
1871740 | https://en.wikipedia.org/wiki/Ultraviolet%20index | Ultraviolet index | The ultraviolet index, or UV index, is an international standard measurement of the strength of the sunburn-producing ultraviolet (UV) radiation at a particular place and time. It is primarily used in daily and hourly forecasts aimed at the general public. The UV index is designed as an open-ended linear scale, directl... | Physical sciences | Other_2 | Basics and measurement |
1872854 | https://en.wikipedia.org/wiki/Biochemical%20cascade | Biochemical cascade | A biochemical cascade, also known as a signaling cascade or signaling pathway, is a series of chemical reactions that occur within a biological cell when initiated by a stimulus. This stimulus, known as a first messenger, acts on a receptor that is transduced to the cell interior through second messengers which amplify... | Biology and health sciences | Cell processes | Biology |
1874591 | https://en.wikipedia.org/wiki/German%20cockroach | German cockroach | The German cockroach (Blattella germanica), colloquially known as the croton bug, is a species of small cockroach, typically about long. In color it varies from tan to almost black, and it has two dark, roughly parallel, streaks on the pronotum running anteroposteriorly from behind the head to the base of the wings. A... | Biology and health sciences | Cockroaches & Termites (Blattodea) | Animals |
1254965 | https://en.wikipedia.org/wiki/Maroon | Maroon | Maroon (US/UK , Australia ) is a brownish crimson color that takes its name from the French word , meaning chestnut. Marron is also one of the French translations for "brown".
Terms describing interchangeable shades, with overlapping RGB ranges, include burgundy, claret, mulberry, and crimson.
Different dictionarie... | Physical sciences | Colors | Physics |
1255740 | https://en.wikipedia.org/wiki/Clathrate%20compound | Clathrate compound | A clathrate is a chemical substance consisting of a lattice that traps or contains molecules. The word clathrate is derived from the Latin (), meaning 'with bars, latticed'. Most clathrate compounds are polymeric and completely envelop the guest molecule, but in modern usage clathrates also include host–guest complex... | Physical sciences | Supramolecular chemistry | Chemistry |
1256645 | https://en.wikipedia.org/wiki/Cycloaddition | Cycloaddition | In organic chemistry, a cycloaddition is a chemical reaction in which "two or more unsaturated molecules (or parts of the same molecule) combine with the formation of a cyclic adduct in which there is a net reduction of the bond multiplicity". The resulting reaction is a cyclization reaction. Many but not all cycloaddi... | Physical sciences | Organic reactions | Chemistry |
1257941 | https://en.wikipedia.org/wiki/Ornithopoda | Ornithopoda | Ornithopoda () is a clade of ornithischian dinosaurs, called ornithopods (). They represent one of the most successful groups of herbivorous dinosaurs during the Cretaceous. The most primitive members of the group were bipedal and relatively small-sized, while advanced members of the subgroup Iguanodontia became quadru... | Biology and health sciences | Ornitischians | Animals |
2601203 | https://en.wikipedia.org/wiki/Roof%20shingle | Roof shingle | A roof’s shingles are a roof covering consisting of individual overlapping elements. These elements are typically flat, rectangular shapes laid in courses from the bottom edge of the roof up, with each successive course overlapping the joints below. Shingles are held by the roof rafters and are made of various materia... | Technology | Building materials | null |
2603832 | https://en.wikipedia.org/wiki/Allied%20health%20professions | Allied health professions | Allied health professions (AHPs) are a category of health professionals that provide a range of diagnostic, preventive, therapeutic, and rehabilitative services in connection with health care. While there is no international standard for defining the diversity of allied health professions, they are typically considere... | Biology and health sciences | Fields of medicine | Health |
2604065 | https://en.wikipedia.org/wiki/Agricultural%20education | Agricultural education | Agricultural education is the systematic and organized teaching, instruction and training (theoretical as well as hands-on, real-world fieldwork-based) available to students, farmers or individuals interested in the science, business and technology of agriculture (animal and plant production) as well as the management ... | Technology | Academic disciplines | null |
2604677 | https://en.wikipedia.org/wiki/Tabqa%20Dam | Tabqa Dam | The Tabqa Dam (, ; ), or al-Thawra Dam as it is also named (, ; , literally "Revolution Dam"), most commonly known as Euphrates Dam (; ; ), is an earthen dam on the Euphrates, located upstream from the city of Raqqa in Raqqa Governorate, Syria. The city of Al-Thawrah is located immediately south of the dam. The dam is... | Technology | Dams | null |
3552729 | https://en.wikipedia.org/wiki/Marine%20engineering | Marine engineering | Marine engineering is the engineering of boats, ships, submarines, and any other marine vessel. Here it is also taken to include the engineering of other ocean systems and structures – referred to in certain academic and professional circles as "ocean engineering". After completing this degree one can join a ship as an... | Technology | Disciplines | null |
3553872 | https://en.wikipedia.org/wiki/Viperfish | Viperfish | A viperfish is any species of marine fish in the genus Chauliodus. Viperfishes are mostly found in the mesopelagic zone and are characterized by long, needle-like teeth and hinged lower jaws. A typical viperfish grows to lengths of . Viperfishes undergo diel vertical migration and are found all around the world in trop... | Biology and health sciences | Stomiiformes | Animals |
3555585 | https://en.wikipedia.org/wiki/Vertical%20farming | Vertical farming | Vertical farming is the practice of growing crops in vertically and horizontally stacked layers. It often incorporates controlled-environment agriculture, which aims to optimize plant growth, and soilless farming techniques such as hydroponics, aquaponics, and aeroponics. Some common choices of structures to house vert... | Technology | Agriculture_2 | null |
18616290 | https://en.wikipedia.org/wiki/Gamma%20ray | Gamma ray | A gamma ray, also known as gamma radiation (symbol ), is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves, typically shorter than those of X-rays. With frequencies above 30 exahertz () and wavelengths less t... | Physical sciences | Nuclear physics | null |
18617142 | https://en.wikipedia.org/wiki/Mercury%20%28element%29 | Mercury (element) | Mercury is a chemical element; it has symbol Hg and atomic number 80. It is also known as quicksilver and was formerly named hydrargyrum ( ) from the Greek words and , from which its chemical symbol is derived. A heavy, silvery d-block element, mercury is the only metallic element that is known to be liquid at stand... | Physical sciences | Chemical elements_2 | null |
23676652 | https://en.wikipedia.org/wiki/Fallopian%20tube | Fallopian tube | The fallopian tubes, also known as uterine tubes, oviducts or salpinges (: salpinx), are paired tubular sex organs in the human female body that stretch from the ovaries to the uterus. The fallopian tubes are part of the female reproductive system. In other vertebrates, they are only called oviducts.
Each tube is a mu... | Biology and health sciences | Reproductive system | Biology |
23681458 | https://en.wikipedia.org/wiki/Recrystallization%20%28chemistry%29 | Recrystallization (chemistry) | Recrystallization is a method used to purify chemicals by dissolving a mixture of a compound and its impurities, in an appropriate solvent, prior to heating the solution. Following the dissolution of crude product, the mixture will passively cool, yielding a crystallized compound and its impurities as separate entities... | Physical sciences | Other separations | Chemistry |
23682291 | https://en.wikipedia.org/wiki/Cam%20follower | Cam follower | A cam follower, also known as a track follower, is a specialized type of roller or needle bearing designed to follow cam lobe profiles. Cam followers come in a vast array of different configurations, however the most defining characteristic is how the cam follower mounts to its mating part; stud style cam followers use... | Technology | Mechanisms | null |
10630377 | https://en.wikipedia.org/wiki/Stratigraphic%20section | Stratigraphic section | A stratigraphic section is a sequence of layers of rocks in the order they were deposited. It is based on the principle of original horizontality, which states that layers of sediment are originally deposited horizontally under the action of gravity.
Biostratigraphers estimate the age of stratigraphic sections by usin... | Physical sciences | Stratigraphy | Earth science |
10638682 | https://en.wikipedia.org/wiki/Infrared%20telescope | Infrared telescope | An infrared telescope is a telescope that uses infrared light to detect celestial bodies. Infrared light is one of several types of radiation present in the electromagnetic spectrum.
All celestial objects with a temperature above absolute zero emit some form of electromagnetic radiation. In order to study the universe... | Technology | Telescope | null |
23859945 | https://en.wikipedia.org/wiki/N-body%20problem | N-body problem | In physics, the -body problem is the problem of predicting the individual motions of a group of celestial objects interacting with each other gravitationally. Solving this problem has been motivated by the desire to understand the motions of the Sun, Moon, planets, and visible stars. In the 20th century, understanding ... | Physical sciences | Classical mechanics | Physics |
125024 | https://en.wikipedia.org/wiki/Tevatron | Tevatron | The Tevatron was a circular particle accelerator (active until 2011) in the United States, at the Fermi National Accelerator Laboratory (called Fermilab), east of Batavia, Illinois, and was the highest energy particle collider until the Large Hadron Collider (LHC) of the European Organization for Nuclear Research (CERN... | Physical sciences | Particle physics: General | null |
125274 | https://en.wikipedia.org/wiki/SkyTrain%20%28Vancouver%29 | SkyTrain (Vancouver) | SkyTrain is the medium-capacity rapid transit system serving the Metro Vancouver region in British Columbia, Canada. SkyTrain has of track and uses fully automated trains on grade-separated tracks running on underground and elevated guideways, allowing SkyTrain to hold consistently high on-time reliability. In , the s... | Technology | Canada | null |
125276 | https://en.wikipedia.org/wiki/Matrix%20addition | Matrix addition | In mathematics, matrix addition is the operation of adding two matrices by adding the corresponding entries together.
For a vector, , adding two matrices would have the geometric effect of applying each matrix transformation separately onto , then adding the transformed vectors.
However, there are other operations t... | Mathematics | Linear algebra | null |
125280 | https://en.wikipedia.org/wiki/Matrix%20multiplication | Matrix multiplication | In mathematics, specifically in linear algebra, matrix multiplication is a binary operation that produces a matrix from two matrices. For matrix multiplication, the number of columns in the first matrix must be equal to the number of rows in the second matrix. The resulting matrix, known as the matrix product, has the ... | Mathematics | Linear algebra | null |
125293 | https://en.wikipedia.org/wiki/Copper | Copper | Copper is a chemical element. It has the symbol Cu (), and the atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building materi... | Physical sciences | Chemistry | null |
125296 | https://en.wikipedia.org/wiki/Delusion | Delusion | A delusion is a false fixed belief that is not amenable to change in light of conflicting evidence. As a pathology, it is distinct from a belief based on false or incomplete information, confabulation, dogma, illusion, hallucination, or some other misleading effects of perception, as individuals with those beliefs are ... | Biology and health sciences | Miscellaneous | null |
125297 | https://en.wikipedia.org/wiki/Dynamic%20programming | Dynamic programming | Dynamic programming is both a mathematical optimization method and an algorithmic paradigm. The method was developed by Richard Bellman in the 1950s and has found applications in numerous fields, from aerospace engineering to economics.
In both contexts it refers to simplifying a complicated problem by breaking it dow... | Mathematics | Optimization | null |
23690287 | https://en.wikipedia.org/wiki/Hexagonal%20crystal%20family | Hexagonal crystal family | In crystallography, the hexagonal crystal family is one of the six crystal families, which includes two crystal systems (hexagonal and trigonal) and two lattice systems (hexagonal and rhombohedral). While commonly confused, the trigonal crystal system and the rhombohedral lattice system are not equivalent (see section ... | Physical sciences | Crystallography | Physics |
8251651 | https://en.wikipedia.org/wiki/European%20conger | European conger | The European conger (Conger conger) is a species of conger of the family Congridae. It is the heaviest eel in the world and native to the northeast Atlantic, including the Mediterranean Sea.
Description and behavior
European congers have an average adult length of , a maximum known length of around (possibly up to f... | Biology and health sciences | Anguilliformes | Animals |
4786318 | https://en.wikipedia.org/wiki/Linear%20dynamical%20system | Linear dynamical system | Linear dynamical systems are dynamical systems whose evolution functions are linear. While dynamical systems, in general, do not have closed-form solutions, linear dynamical systems can be solved exactly, and they have a rich set of mathematical properties. Linear systems can also be used to understand the qualitativ... | Mathematics | Dynamical systems | null |
4788153 | https://en.wikipedia.org/wiki/Black%20bullhead | Black bullhead | The black bullhead or black bullhead catfish (Ameiurus melas) is a species of bullhead catfish. Like other bullhead catfish, it has the ability to thrive in waters that are low in oxygen, brackish, turbid, and/or very warm. It also has barbels located near its mouth, a broad head, spiny fins, and no scales. It can be ... | Biology and health sciences | Siluriformes | Animals |
4790683 | https://en.wikipedia.org/wiki/Engineering%20ethics | Engineering ethics | Engineering ethics is the field of system of moral principles that apply to the practice of engineering. The field examines and sets the obligations by engineers to society, to their clients, and to the profession. As a scholarly discipline, it is closely related to subjects such as the philosophy of science, the philo... | Technology | Basics | null |
4791850 | https://en.wikipedia.org/wiki/Chinchilla%20rabbit | Chinchilla rabbit | Chinchilla rabbits are a group of three rabbit breeds that have been bred for a coat that resembles that of chinchillas. Despite their name, they are not related to, and cannot interbreed with, chinchillas, a genus of rodent. Rabbits, in contrast, are lagomorphs. A mutation diluted the yellow pigment in the hairs to al... | Biology and health sciences | Rabbits | Animals |
12891610 | https://en.wikipedia.org/wiki/Papeda%20%28citrus%29 | Papeda (citrus) | Papeda or papaeda is the common name for a group of Citrus species and varieties native to tropical Asia that are hardy and slow-growing, and produce unpalatable fruit. Walter Tennyson Swingle segregated these species into a separate subgenus, Papeda, that included the Ichang lemon, yuzu, kaffir lime, kabosu, sudachi, ... | Biology and health sciences | Citrus fruits | Plants |
474589 | https://en.wikipedia.org/wiki/Ultra-high-energy%20cosmic%20ray | Ultra-high-energy cosmic ray | In astroparticle physics, an ultra-high-energy cosmic ray (UHECR) is a cosmic ray with an energy greater than 1 EeV (1018 electronvolts, approximately 0.16 joules), far beyond both the rest mass and energies typical of other cosmic ray particles. The origin of these highest energy cosmic ray is not known.
These partic... | Physical sciences | Basics_2 | Astronomy |
474843 | https://en.wikipedia.org/wiki/Sea%20pen | Sea pen | Sea pens are marine cnidarians belonging to the order Pennatulacea, which are colony-forming benthic filter feeders within the class Octocorallia (subphylum Anthozoa). There are 14 families within the order and 35 extant genera; it is estimated that of 450 described species, around 200 are valid.
Sea pens have a cosmo... | Biology and health sciences | Cnidarians | Animals |
474873 | https://en.wikipedia.org/wiki/Mamba | Mamba | Mambas are fast-moving, highly venomous snakes of the genus Dendroaspis (which literally means "tree asp") in the family Elapidae. Four extant species are recognised currently; three of those four species are essentially arboreal and green in colour, whereas the black mamba, Dendroaspis polylepis, is largely terrestria... | Biology and health sciences | Reptiles | null |
474905 | https://en.wikipedia.org/wiki/Tincture%20of%20iodine | Tincture of iodine | Tincture of iodine, iodine tincture, or weak iodine solution is an antiseptic. It is usually 2 to 3% elemental iodine, along with potassium iodide or sodium iodide, dissolved in a mixture of ethanol and water. Tincture solutions are characterized by the presence of alcohol. It was used from 1908 in pre-operative skin p... | Physical sciences | Halide salts | Chemistry |
475008 | https://en.wikipedia.org/wiki/Stiffness | Stiffness | Stiffness is the extent to which an object resists deformation in response to an applied force.
The complementary concept is flexibility or pliability: the more flexible an object is, the less stiff it is.
Calculations
The stiffness, of a body is a measure of the resistance offered by an elastic body to deformation.... | Physical sciences | Solid mechanics | null |
475153 | https://en.wikipedia.org/wiki/Patch%20%28computing%29 | Patch (computing) | A patch is data that is intended to be used to modify an existing software resource such as a program or a file, often to fix bugs and security vulnerabilities. A patch may be created to improve functionality, usability, or performance. A patch is typically provided by a vendor for updating the software that they provi... | Technology | Software development: General | null |
475161 | https://en.wikipedia.org/wiki/Stoneware | Stoneware | Stoneware is a broad term for pottery fired at a relatively high temperature. A modern definition is a vitreous or semi-vitreous ceramic made primarily from stoneware clay or non-refractory fire clay. End applications include tableware, decorative ware such as vases.
Stoneware is fired at between about to . Historic... | Technology | Materials | null |
475199 | https://en.wikipedia.org/wiki/Low-pressure%20area | Low-pressure area | In meteorology, a low-pressure area, low area or low is a region where the atmospheric pressure is lower than that of surrounding locations. It is the opposite of a high-pressure area. Low-pressure areas are commonly associated with inclement weather (such as cloudy, windy, with possible rain or storms), while high-pre... | Physical sciences | Meteorology: General | null |
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