id stringlengths 2 8 | url stringlengths 31 117 | title stringlengths 1 71 | text stringlengths 153 118k | topic stringclasses 4
values | section stringlengths 4 49 ⌀ | sublist stringclasses 9
values |
|---|---|---|---|---|---|---|
384743 | https://en.wikipedia.org/wiki/Cyclopropane | Cyclopropane | Cyclopropane is the cycloalkane with the molecular formula (CH2)3, consisting of three methylene groups (CH2) linked to each other to form a triangular ring. The small size of the ring creates substantial ring strain in the structure. Cyclopropane itself is mainly of theoretical interest but many of its derivatives - c... | Physical sciences | Aliphatic hydrocarbons | Chemistry |
384744 | https://en.wikipedia.org/wiki/Cyclohexane | Cyclohexane | Cyclohexane is a cycloalkane with the molecular formula . Cyclohexane is non-polar. Cyclohexane is a colourless, flammable liquid with a distinctive detergent-like odor, reminiscent of cleaning products (in which it is sometimes used). Cyclohexane is mainly used for the industrial production of adipic acid and caprolac... | Physical sciences | Aliphatic hydrocarbons | Chemistry |
384749 | https://en.wikipedia.org/wiki/Alicyclic%20compound | Alicyclic compound | In organic chemistry, an alicyclic compound contains one or more all-carbon rings which may be either saturated or unsaturated, but do not have aromatic character. Alicyclic compounds may have one or more aliphatic side chains attached.
The simplest alicyclic compounds are the monocyclic cycloalkanes: cyclopropane, cy... | Physical sciences | Aliphatic hydrocarbons | Chemistry |
384805 | https://en.wikipedia.org/wiki/Manhattan%20Bridge | Manhattan Bridge | The Manhattan Bridge is a suspension bridge that crosses the East River in New York City, connecting Lower Manhattan at Canal Street with Downtown Brooklyn at the Flatbush Avenue Extension. Designed by Leon Moisseiff and built by the Phoenix Bridge Company, the bridge has a total length of . The bridge is one of four ... | Technology | Bridges | null |
384886 | https://en.wikipedia.org/wiki/Operating%20theater | Operating theater | An operating theater (also known as an Operating Room (OR), operating suite, operation suite, or Operation Theatre (OT)) is a facility within a hospital where surgical operations are carried out in an aseptic environment.
Historically, the term "operating theater" referred to a non-sterile, tiered theater or amphithea... | Biology and health sciences | Health facilities | Health |
384968 | https://en.wikipedia.org/wiki/Asiatic%20linsang | Asiatic linsang | The Asiatic linsang (Prionodon) is a genus comprising two species native to Southeast Asia: the banded linsang (Prionodon linsang) and the spotted linsang (Prionodon pardicolor). Prionodon is considered a sister taxon of the Felidae.
Characteristics
The coat pattern of the Asiatic linsang is distinct, consisting of la... | Biology and health sciences | Other carnivora | Animals |
385156 | https://en.wikipedia.org/wiki/Leopard%20seal | Leopard seal | The leopard seal (Hydrurga leptonyx), also referred to as the sea leopard, is the second largest species of seal in the Antarctic (after the southern elephant seal). Its only natural predator is the orca. It feeds on a wide range of prey including cephalopods, other pinnipeds, krill, fish, and birds, particularly pengu... | Biology and health sciences | Pinnipeds | Animals |
385334 | https://en.wikipedia.org/wiki/List%20of%20particles | List of particles | This is a list of known and hypothesized microscopic particles in particle physics, condensed matter physics and cosmology.
Standard Model elementary particles
Elementary particles are particles with no measurable internal structure; that is, it is unknown whether they are composed of other particles. They are the f... | Physical sciences | Subatomic particles: General | Physics |
385416 | https://en.wikipedia.org/wiki/Momordica%20charantia | Momordica charantia | Momordica charantia, (commonly called bitter melon, cerassee, goya, bitter apple, bitter gourd, bitter squash, balsam-pear, karavila and many more names listed below) is a tropical and subtropical vine of the family Cucurbitaceae,widely grown in Asia, Africa, and the Caribbean for its edible fruit. Its many varieties d... | Biology and health sciences | Botanical fruits used as culinary vegetables | Plants |
385786 | https://en.wikipedia.org/wiki/Victoria%20%28plant%29 | Victoria (plant) | Victoria or giant waterlily is a genus of aquatic herbs in the plant family Nymphaeaceae. Its leaves have a remarkable size: Victoria boliviana produces leaves up to in width. The genus name was given in honour of Queen Victoria of the United Kingdom.
Description
Vegetative characteristics
Victoria species are rhiz... | Biology and health sciences | Nymphaeales | Plants |
5810488 | https://en.wikipedia.org/wiki/CW%20Leonis | CW Leonis | CW Leonis or IRC +10216 is a variable carbon star that is embedded in a thick dust envelope. It was first discovered in 1969 by a group of astronomers led by Eric Becklin, based upon infrared observations made with the 62-inch Caltech Infrared Telescope at Mount Wilson Observatory. Its energy is emitted mostly at infra... | Physical sciences | Notable stars | Astronomy |
5813824 | https://en.wikipedia.org/wiki/Complex%20volcano | Complex volcano | A complex volcano, also called a compound volcano or a volcanic complex, is a mixed landform consisting of related volcanic centers and their associated lava flows and pyroclastic rock. They may form due to changes in eruptive habit or in the location of the principal vent area on a particular volcano. Stratovolcanoes ... | Physical sciences | Volcanology | Earth science |
7580913 | https://en.wikipedia.org/wiki/Basal%20sliding | Basal sliding | Basal sliding is the act of a glacier sliding over the bed due to meltwater under the ice acting as a lubricant. This movement very much depends on the temperature of the area, the slope of the glacier, the bed roughness, the amount of meltwater from the glacier, and the glacier's size.
The movement that happens to th... | Physical sciences | Glaciology | Earth science |
7587207 | https://en.wikipedia.org/wiki/Absolute%20configuration | Absolute configuration | In chemistry, absolute configuration refers to the spatial arrangement of atoms within a molecular entity (or group) that is chiral, and its resultant stereochemical description. Absolute configuration is typically relevant in organic molecules where carbon is bonded to four different substituents. This type of constru... | Physical sciences | Stereochemistry | Chemistry |
16652317 | https://en.wikipedia.org/wiki/Linear%20motion | Linear motion | Linear motion, also called rectilinear motion, is one-dimensional motion along a straight line, and can therefore be described mathematically using only one spatial dimension. The linear motion can be of two types: uniform linear motion, with constant velocity (zero acceleration); and non-uniform linear motion, with va... | Physical sciences | Classical mechanics | Physics |
2336870 | https://en.wikipedia.org/wiki/Bo%C3%B6tes%20Void | Boötes Void | The Boötes Void ( ) (colloquially referred to as the Great Nothing) is an approximately spherical region of space found in the vicinity of the constellation Boötes, containing only 60 galaxies instead of the 2,000 that should be expected from an area this large, hence its name. With a radius of 62 megaparsecs (nearly 3... | Physical sciences | Notable patches of universe | Astronomy |
11295734 | https://en.wikipedia.org/wiki/Cloud%20storage | Cloud storage | Cloud storage is a model of computer data storage in which data, said to be on "the cloud", is stored remotely in logical pools and is accessible to users over a network, typically the Internet. The physical storage spans multiple servers (sometimes in multiple locations), and the physical environment is typically owne... | Technology | Data storage and memory | null |
17833105 | https://en.wikipedia.org/wiki/Weak%20gravitational%20lensing | Weak gravitational lensing | While the presence of any mass bends the path of light passing near it, this effect rarely produces the giant arcs and multiple images associated with strong gravitational lensing. Most lines of sight in the universe are thoroughly in the weak lensing regime, in which the deflection is impossible to detect in a single... | Physical sciences | Basics_2 | Astronomy |
17842246 | https://en.wikipedia.org/wiki/Fold%20mountains | Fold mountains | Fold mountains are formed by the effects of folding on layers within the upper part of the Earth's crust. Before the development of the theory of plate tectonics and before the internal architecture of thrust belts became well understood, the term was used to describe most mountain belts but has otherwise fallen out of... | Physical sciences | Montane landforms | Earth science |
14952458 | https://en.wikipedia.org/wiki/Flag%20semaphore | Flag semaphore | Flag semaphore (from the Ancient Greek () 'sign' and - (-) '-bearer') is a semaphore system conveying information at a distance by means of visual signals with hand-held flags, rods, disks, paddles, or occasionally bare or gloved hands. Information is encoded by the position of the flags; it is read when the flag is i... | Technology | Telecommunications | null |
4374425 | https://en.wikipedia.org/wiki/Optical%20pumping | Optical pumping | Optical pumping is a process in which light is used to raise (or "pump") electrons from a lower energy level in an atom or molecule to a higher one. It is commonly used in laser construction to pump the active laser medium so as to achieve population inversion. The technique was developed by the 1966 Nobel Prize winner... | Physical sciences | Atomic physics | Physics |
4375088 | https://en.wikipedia.org/wiki/Stegosauria | Stegosauria | Stegosauria is a group of herbivorous ornithischian dinosaurs that lived during the Jurassic and early Cretaceous periods. Stegosaurian fossils have been found mostly in the Northern Hemisphere (North America, Europe and Asia), Africa and possibly South America. Their geographical origins are unclear; the earliest uneq... | Biology and health sciences | Ornitischians | Animals |
9117691 | https://en.wikipedia.org/wiki/Cotylorhynchus | Cotylorhynchus | Cotylorhynchus is an extinct genus of herbivorous caseid synapsids that lived during the late Lower Permian (Kungurian) and possibly the early Middle Permian (Roadian) in what is now Texas and Oklahoma. The large number of specimens found make it the best-known caseid. Like all large herbivorous caseids, Cotylorhynchus... | Biology and health sciences | Proto-mammals | Animals |
9126890 | https://en.wikipedia.org/wiki/Open%20fracture | Open fracture | An open fracture, also called a compound fracture, is a type of bone fracture (broken bone) that has an open wound in the skin near the fractured bone. The skin wound is usually caused by the bone breaking through the surface of the skin. An open fracture can be life threatening or limb-threatening (person may be at ri... | Biology and health sciences | Types | Health |
9127632 | https://en.wikipedia.org/wiki/Biology | Biology | Biology is the scientific study of life. It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field. For instance, all organisms are composed of at least one cell that processes hereditary information encoded in genes, which can be transmitted to future g... | Biology and health sciences | Science and medicine | null |
5819718 | https://en.wikipedia.org/wiki/Portia%20labiata | Portia labiata | Portia labiata is a jumping spider (family Salticidae) found in Sri Lanka, India, southern China, Burma (Myanmar), Malaysia, Singapore, Java, Sumatra and the Philippines. In this medium-sized jumping spider, the front part is orange-brown and the back part is brownish. The conspicuous main eyes provide vision more acut... | Biology and health sciences | Spiders | Animals |
7592567 | https://en.wikipedia.org/wiki/Introduction%20to%20entropy | Introduction to entropy | In thermodynamics, entropy is a numerical quantity that shows that many physical processes can go in only one direction in time. For example, cream and coffee can be mixed together, but cannot be "unmixed"; a piece of wood can be burned, but cannot be "unburned". The word 'entropy' has entered popular usage to refer to... | Physical sciences | Thermodynamics | Physics |
1101085 | https://en.wikipedia.org/wiki/Orangery | Orangery | An orangery or orangerie is a room or dedicated building, historically where orange and other fruit trees are protected during the winter, as a large form of greenhouse or conservatory.<ref>Gervase Markham, in The Whole Art of Husbandry (London 1631) also recommends protecting other delicate fruiting trees— "Orange, Le... | Technology | Buildings and infrastructure | null |
1101364 | https://en.wikipedia.org/wiki/Gaussian%20units | Gaussian units | Gaussian units constitute a metric system of units of measurement. This system is the most common of the several electromagnetic unit systems based on the centimetre–gram–second system of units (CGS). It is also called the Gaussian unit system, Gaussian-cgs units, or often just cgs units. The term "cgs units" is ambigu... | Physical sciences | Measurement systems | Basics and measurement |
1101849 | https://en.wikipedia.org/wiki/Cyclic%20voltammetry | Cyclic voltammetry | In electrochemistry, cyclic voltammetry (CV) is a type of voltammetric measurement where the potential of the working electrode is ramped linearly versus time. Unlike in linear sweep voltammetry, after the set potential is reached in a CV experiment, the working electrode's potential is ramped in the opposite direction... | Physical sciences | Electrical methods | Chemistry |
1101949 | https://en.wikipedia.org/wiki/Orthoceras | Orthoceras | Orthoceras is a genus of extinct nautiloid cephalopod restricted to Middle Ordovician-aged marine limestones of the Baltic States and Sweden. This genus is sometimes called Orthoceratites. Note it is sometimes misspelled as Orthocera, Orthocerus or Orthoceros.
Orthoceras was formerly thought to have had a worldwide di... | Biology and health sciences | Cephalopods | Animals |
1102339 | https://en.wikipedia.org/wiki/Volcanic%20arc | Volcanic arc | A volcanic arc (also known as a magmatic arc) is a belt of volcanoes formed above a subducting oceanic tectonic plate, with the belt arranged in an arc shape as seen from above. Volcanic arcs typically parallel an oceanic trench, with the arc located further from the subducting plate than the trench. The oceanic plate ... | Physical sciences | Volcanology | Earth science |
1102522 | https://en.wikipedia.org/wiki/Pack%20animal | Pack animal | A pack animal, also known as a sumpter animal or beast of burden, is a working animal used to transport goods or materials by carrying them, usually on its back.
Domestic animals of many species are used in this way, among them alpacas, Bactrian camels, donkeys, dromedaries, gayal, goats, horses, llamas, mules, reinde... | Technology | Agriculture, labor and economy | null |
1102900 | https://en.wikipedia.org/wiki/Notostraca | Notostraca | The order Notostraca, containing the single family Triopsidae, is a group of crustaceans known as tadpole shrimp or shield shrimp. The two genera, Triops and Lepidurus, are considered living fossils, with similar forms having existed since the end of the Devonian, around 360 million years ago. They have a broad, flat c... | Biology and health sciences | Crustaceans | Animals |
1104705 | https://en.wikipedia.org/wiki/Calvin%20cycle | Calvin cycle | The Calvin cycle, light-independent reactions, bio synthetic phase, dark reactions, or photosynthetic carbon reduction (PCR) cycle of photosynthesis is a series of chemical reactions that convert carbon dioxide and hydrogen-carrier compounds into glucose. The Calvin cycle is present in all photosynthetic eukaryotes and... | Biology and health sciences | Metabolic processes | Biology |
1104822 | https://en.wikipedia.org/wiki/Ceratosaurus | Ceratosaurus | Ceratosaurus (from Greek 'horn' and 'lizard') was a carnivorous theropod dinosaur that lived in the Late Jurassic period (Kimmeridgian to Tithonian ages). The genus was first described in 1884 by American paleontologist Othniel Charles Marsh based on a nearly complete skeleton discovered in Garden Park, Colorado, ... | Biology and health sciences | Theropods | Animals |
1105247 | https://en.wikipedia.org/wiki/Alarm%20clock | Alarm clock | An alarm clock or alarm is a clock that is designed to alert an individual or group of people at a specified time. The primary function of these clocks is to awaken people from their night's sleep or short naps; they can sometimes be used for other reminders as well. Most alarm clocks make sounds; some make light or vi... | Technology | Clocks | null |
1105295 | https://en.wikipedia.org/wiki/Sill%20%28geology%29 | Sill (geology) | In geology, a sill is a tabular sheet intrusion that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or along the direction of foliation in metamorphic rock. A sill is a concordant intrusive sheet, meaning that it does not cut across preexisting rock beds. Stacking of sills builds ... | Physical sciences | Geologic features | Earth science |
3223397 | https://en.wikipedia.org/wiki/Cock-of-the-rock | Cock-of-the-rock | The cocks-of-the-rock, which compose the genus Rupicola, are large cotingid birds native to South America. The first alleged examples of this species were documented during a research expedition led by the explorer and biologist Sir Joshua Wilson in the mid-1700s. They are found in tropical and subtropical rainforests ... | Biology and health sciences | Tyranni | Animals |
3224219 | https://en.wikipedia.org/wiki/Second%20derivative | Second derivative | In calculus, the second derivative, or the second-order derivative, of a function is the derivative of the derivative of . Informally, the second derivative can be phrased as "the rate of change of the rate of change"; for example, the second derivative of the position of an object with respect to time is the instanta... | Mathematics | Differential calculus | null |
3224795 | https://en.wikipedia.org/wiki/Scientific%20modelling | Scientific modelling | Scientific modelling is an activity that produces models representing empirical objects, phenomena, and physical processes, to make a particular part or feature of the world easier to understand, define, quantify, visualize, or simulate. It requires selecting and identifying relevant aspects of a situation in the real ... | Physical sciences | Basics | null |
3225400 | https://en.wikipedia.org/wiki/Bicycle%20gearing | Bicycle gearing | Bicycle gearing is the aspect of a bicycle drivetrain that determines the relation between the cadence, the rate at which the rider pedals, and the rate at which the drive wheel turns.
On some bicycles there is only one gear and, therefore, the gear ratio is fixed, but most modern bicycles have multiple gears and thus... | Technology | Human-powered transport | null |
3225759 | https://en.wikipedia.org/wiki/Caryophyllene | Caryophyllene | Caryophyllene (), more formally (−)-β-caryophyllene (BCP), is a natural bicyclic sesquiterpene that occurs widely in nature. Caryophyllene is notable for having a cyclobutane ring, as well as a trans-double bond in a 9-membered ring, both rarities in nature.
Production
Caryophyllene can be produced synthetically, but... | Physical sciences | Terpenes and terpenoids | Chemistry |
3227482 | https://en.wikipedia.org/wiki/Humulene | Humulene | Humulene, also known as α-humulene or α-caryophyllene, is a naturally occurring monocyclic sesquiterpene (C15H24), containing an 11-membered ring and consisting of 3 isoprene units containing three nonconjugated C=C double bonds, two of them being triply substituted and one being doubly substituted. It was first found ... | Physical sciences | Terpenes and terpenoids | Chemistry |
1677334 | https://en.wikipedia.org/wiki/Rate%20equation | Rate equation | In chemistry, the rate equation (also known as the rate law or empirical differential rate equation) is an empirical differential mathematical expression for the reaction rate of a given reaction in terms of concentrations of chemical species and constant parameters (normally rate coefficients and partial orders of rea... | Physical sciences | Kinetics | Chemistry |
1677930 | https://en.wikipedia.org/wiki/Seed%20dispersal | Seed dispersal | In spermatophyte plants, seed dispersal is the movement, spread or transport of seeds away from the parent plant. Plants have limited mobility and rely upon a variety of dispersal vectors to transport their seeds, including both abiotic vectors, such as the wind, and living (biotic) vectors such as birds. Seeds can be ... | Biology and health sciences | Ecology | Biology |
1678326 | https://en.wikipedia.org/wiki/Snout | Snout | A snout is the protruding portion of an animal's face, consisting of its nose, mouth, and jaw. In many animals, the structure is called a muzzle, rostrum, beak or proboscis. The wet furless surface around the nostrils of the nose of many mammals is called the rhinarium (colloquially this is the "cold wet snout" of some... | Biology and health sciences | External anatomy and regions of the body | Biology |
1678438 | https://en.wikipedia.org/wiki/Temperate%20forest | Temperate forest | A temperate forest is a forest found between the tropical and boreal regions, located in the temperate zone. It is the second largest terrestrial biome, covering 25% of the world's forest area, only behind the boreal forest, which covers about 33%. These forests cover both hemispheres at latitudes ranging from 25 to 50... | Physical sciences | Forests | Earth science |
1678816 | https://en.wikipedia.org/wiki/Zoysia | Zoysia | Zoysia (; , -, -, -) is a genus of creeping grasses widespread across much of Asia and Australia, as well as various islands in the Pacific. These species, commonly called zoysia or zoysiagrass, are found in coastal areas or grasslands. It is a popular choice for fairways and teeing areas at golf courses. The genus is ... | Biology and health sciences | Poales | Plants |
1679935 | https://en.wikipedia.org/wiki/Electric%20power%20quality | Electric power quality | Electric power quality is the degree to which the voltage, frequency, and waveform of a power supply system conform to established specifications. Good power quality can be defined as a steady supply voltage that stays within the prescribed range, steady AC frequency close to the rated value, and smooth voltage curve ... | Technology | Concepts | null |
1680145 | https://en.wikipedia.org/wiki/Strain%20%28chemistry%29 | Strain (chemistry) | In chemistry, a molecule experiences strain when its chemical structure undergoes some stress which raises its internal energy in comparison to a strain-free reference compound. The internal energy of a molecule consists of all the energy stored within it. A strained molecule has an additional amount of internal ener... | Physical sciences | Stereochemistry | Chemistry |
1680877 | https://en.wikipedia.org/wiki/Air%20filter | Air filter | A particulate air filter is a device composed of fibrous, or porous materials which removes particulates such as smoke, dust, pollen, mold, viruses and bacteria from the air. Filters containing an adsorbent or catalyst such as charcoal (carbon) may also remove odors and gaseous pollutants such as volatile organic compo... | Technology | Food, water and health | null |
11312166 | https://en.wikipedia.org/wiki/Unionida | Unionida | Unionida is a monophyletic order of freshwater mussels, aquatic bivalve molluscs. The order includes most of the larger freshwater mussels, including the freshwater pearl mussels. The most common families are the Unionidae and the Margaritiferidae. All have in common a larval stage that is temporarily parasitic on fi... | Biology and health sciences | Bivalvia | Animals |
658074 | https://en.wikipedia.org/wiki/Observational%20cosmology | Observational cosmology | Observational cosmology is the study of the structure, the evolution and the origin of the universe through observation, using instruments such as telescopes and cosmic ray detectors.
Early observations
The science of physical cosmology as it is practiced today had its subject material defined in the years following t... | Physical sciences | Physical cosmology | Astronomy |
658084 | https://en.wikipedia.org/wiki/Magnifying%20glass | Magnifying glass | A magnifying glass is a convex lens that is used to produce a magnified image of an object. The lens is usually mounted in a frame with a handle. Beyond its primary function of magnification, this simple yet ingenious tool serves a variety of purposes. It can be employed to focus sunlight, harnessing the Sun's rays to ... | Technology | Optical instruments | null |
658095 | https://en.wikipedia.org/wiki/Olm | Olm | The olm () or proteus (Proteus anguinus) is an aquatic salamander which is the only species in the genus Proteus of the family Proteidae and the only exclusively cave-dwelling chordate species found in Europe; the family's other extant genus is Necturus. In contrast to most amphibians, it is entirely aquatic, eating, s... | Biology and health sciences | Salamanders and newts | Animals |
658141 | https://en.wikipedia.org/wiki/Peridotite | Peridotite | Peridotite ( ) is a dense, coarse-grained igneous rock consisting mostly of the silicate minerals olivine and pyroxene. Peridotite is ultramafic, as the rock contains less than 45% silica. It is high in magnesium (Mg2+), reflecting the high proportions of magnesium-rich olivine, with appreciable iron. Peridotite is der... | Physical sciences | Igneous rocks | Earth science |
658550 | https://en.wikipedia.org/wiki/P%20%28complexity%29 | P (complexity) | In computational complexity theory, P, also known as PTIME or DTIME(nO(1)), is a fundamental complexity class. It contains all decision problems that can be solved by a deterministic Turing machine using a polynomial amount of computation time, or polynomial time.
Cobham's thesis holds that P is the class of computati... | Mathematics | Complexity theory | null |
658808 | https://en.wikipedia.org/wiki/Material%20conditional | Material conditional | The material conditional (also known as material implication) is an operation commonly used in logic. When the conditional symbol is interpreted as material implication, a formula is true unless is true and is false. Material implication can also be characterized inferentially by modus ponens, modus tollens, condit... | Mathematics | Mathematical logic | null |
658871 | https://en.wikipedia.org/wiki/Turboshaft | Turboshaft | A turboshaft engine is a form of gas turbine that is optimized to produce shaft horsepower rather than jet thrust. In concept, turboshaft engines are very similar to turbojets, with additional turbine expansion to extract heat energy from the exhaust and convert it into output shaft power. They are even more similar to... | Technology | Aircraft components | null |
659068 | https://en.wikipedia.org/wiki/Mass%20number | Mass number | The mass number (symbol A, from the German word: Atomgewicht, "atomic weight"), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus. It is approximately equal to the atomic (also known as isotopic) mass of the atom expressed in... | Physical sciences | Periodic table | Chemistry |
659325 | https://en.wikipedia.org/wiki/Anesthetic | Anesthetic | An anesthetic (American English) or anaesthetic (British English; see spelling differences) is a drug used to induce anesthesia — in other words, to result in a temporary loss of sensation or awareness. They may be divided into two broad classes: general anesthetics, which result in a reversible loss of consciousness... | Biology and health sciences | Anesthetics | Health |
659899 | https://en.wikipedia.org/wiki/Gravimetric%20analysis | Gravimetric analysis | Gravimetric analysis describes a set of methods used in analytical chemistry for the quantitative determination of an analyte (the ion being analyzed) based on its mass. The principle of this type of analysis is that once an ion's mass has been determined as a unique compound, that known measurement can then be used to... | Physical sciences | Chemical methods | Chemistry |
659939 | https://en.wikipedia.org/wiki/Square | Square | In Euclidean geometry, a square is a regular quadrilateral, which means that it has four straight sides of equal length and four equal angles (90-degree angles, /2 radian angles, or right angles). It can also be defined as a rectangle with two equal-length adjacent sides. It is the only regular polygon whose internal a... | Mathematics | Geometry | null |
659942 | https://en.wikipedia.org/wiki/Square%20%28algebra%29 | Square (algebra) | In mathematics, a square is the result of multiplying a number by itself. The verb "to square" is used to denote this operation. Squaring is the same as raising to the power 2, and is denoted by a superscript 2; for instance, the square of 3 may be written as 32, which is the number 9.
In some cases when superscripts a... | Mathematics | Specific functions | null |
660657 | https://en.wikipedia.org/wiki/Rankine%20cycle | Rankine cycle | The Rankine cycle is an idealized thermodynamic cycle describing the process by which certain heat engines, such as steam turbines or reciprocating steam engines, allow mechanical work to be extracted from a fluid as it moves between a heat source and heat sink. The Rankine cycle is named after William John Macquorn Ra... | Physical sciences | Thermodynamics | Physics |
660870 | https://en.wikipedia.org/wiki/Doxycycline | Doxycycline | Doxycycline is a broad-spectrum antibiotic of the tetracycline class used in the treatment of infections caused by bacteria and certain parasites. It is used to treat bacterial pneumonia, acne, chlamydia infections, Lyme disease, cholera, typhus, and syphilis. It is also used to prevent malaria. Doxycycline may be take... | Biology and health sciences | Antibiotics | Health |
661025 | https://en.wikipedia.org/wiki/Salvia%20hispanica | Salvia hispanica | Salvia hispanica, one of several related species commonly known as chia (), is a species of flowering plant in the mint family, Lamiaceae. It is native to central and southern Mexico and Guatemala. It is considered a pseudocereal, cultivated for its edible, hydrophilic chia seed, grown and commonly used as food in seve... | Biology and health sciences | Pseudocereals | Plants |
661510 | https://en.wikipedia.org/wiki/Clovis%20point | Clovis point | Clovis points are the characteristically fluted projectile points associated with the New World Clovis culture, a prehistoric Paleo-American culture. They are present in dense concentrations across much of North America and they are largely restricted to the north of South America. There are slight differences in point... | Technology | Hand tools | null |
661808 | https://en.wikipedia.org/wiki/Bravais%20lattice | Bravais lattice | In geometry and crystallography, a Bravais lattice, named after , is an infinite array of discrete points generated by a set of discrete translation operations described in three dimensional space by
where the ni are any integers, and ai are primitive translation vectors, or primitive vectors, which lie in differen... | Physical sciences | Crystallography | Physics |
13862505 | https://en.wikipedia.org/wiki/Whippletree%20%28mechanism%29 | Whippletree (mechanism) | A whippletree, or whiffletree, is a mechanism to distribute force evenly through linkages. It is also referred to as an equalizer, leader bar, or double tree. It consists of a bar pivoted at or near the centre, with force applied from one direction to the pivot and from the other direction to the tips. Several whipplet... | Technology | Mechanisms | null |
13865571 | https://en.wikipedia.org/wiki/Disease%20vector | Disease vector | In epidemiology, a disease vector is any living agent that carries and transmits an infectious pathogen such as a parasite or microbe, to another living organism. Agents regarded as vectors are mostly blood-sucking insects such as mosquitoes. The first major discovery of a disease vector came from Ronald Ross in 1897, ... | Biology and health sciences | Concepts | Health |
2339955 | https://en.wikipedia.org/wiki/Xenon%20tetrafluoride | Xenon tetrafluoride | Xenon tetrafluoride is a chemical compound with chemical formula . It was the first discovered binary compound of a noble gas. It is produced by the chemical reaction of xenon with fluorine:
Xe + 2 →
This reaction is exothermic, releasing an energy of 251 kJ/mol.
Xenon tetrafluoride is a colorless crystalline sol... | Physical sciences | Noble gas compounds | Chemistry |
2340343 | https://en.wikipedia.org/wiki/Makemake | Makemake | Makemake (minor-planet designation: 136472 Makemake) is a dwarf planet and the largest of what is known as the classical population of Kuiper belt objects, with a diameter approximately that of Saturn's moon Iapetus, or 60% that of Pluto. It has one known satellite. Its extremely low average temperature, about , means ... | Physical sciences | Solar System | Astronomy |
2343883 | https://en.wikipedia.org/wiki/Depression%20%28geology%29 | Depression (geology) | In geology, a depression is a landform sunken or depressed below the surrounding area. Depressions form by various mechanisms.
Types
Erosion-related:
Blowout: a depression created by wind erosion typically in either a partially vegetated sand dune ecosystem or dry soils (such as a post-glacial loess environment).
G... | Physical sciences | Landforms: General | Earth science |
9853321 | https://en.wikipedia.org/wiki/Interstitial%20defect | Interstitial defect | In materials science, an interstitial defect is a type of point crystallographic defect where an atom of the same or of a different type, occupies an interstitial site in the crystal structure. When the atom is of the same type as those already present they are known as a self-interstitial defect. Alternatively, small ... | Physical sciences | Alloys and ceramic compounds | Chemistry |
9133841 | https://en.wikipedia.org/wiki/Smooth-coated%20otter | Smooth-coated otter | The smooth-coated otter (Lutrogale perspicillata) is a freshwater otter species from regions of South and Southwest Asia, with the majority of its numbers found in Southeast Asia. It has been ranked as "vulnerable" on the IUCN Red List since 1996, as it is threatened by habitat loss, pollution of wetlands and poaching ... | Biology and health sciences | Mustelidae | Animals |
9134092 | https://en.wikipedia.org/wiki/Geodynamics | Geodynamics | Geodynamics is a subfield of geophysics dealing with dynamics of the Earth. It applies physics, chemistry and mathematics to the understanding of how mantle convection leads to plate tectonics and geologic phenomena such as seafloor spreading, mountain building, volcanoes, earthquakes, faulting. It also attempts to pro... | Physical sciences | Geophysics | Earth science |
4387132 | https://en.wikipedia.org/wiki/Gravity%20of%20Earth | Gravity of Earth | The gravity of Earth, denoted by , is the net acceleration that is imparted to objects due to the combined effect of gravitation (from mass distribution within Earth) and the centrifugal force (from the Earth's rotation).
It is a vector quantity, whose direction coincides with a plumb bob and strength or magnitude is g... | Physical sciences | Geophysics | Earth science |
4387406 | https://en.wikipedia.org/wiki/Equations%20for%20a%20falling%20body | Equations for a falling body | A set of equations describing the trajectories of objects subject to a constant gravitational force under normal Earth-bound conditions. Assuming constant acceleration g due to Earth's gravity, Newton's law of universal gravitation simplifies to F = mg, where F is the force exerted on a mass m by the Earth's gravitatio... | Physical sciences | Classical mechanics | Physics |
385846 | https://en.wikipedia.org/wiki/Kaon | Kaon | In particle physics, a kaon, also called a K meson and denoted , is any of a group of four mesons distinguished by a quantum number called strangeness. In the quark model they are understood to be bound states of a strange quark (or antiquark) and an up or down antiquark (or quark).
Kaons have proved to be a copious s... | Physical sciences | Bosons | Physics |
386596 | https://en.wikipedia.org/wiki/Mesa | Mesa | A mesa is an isolated, flat-topped elevation, ridge or hill, which is bounded from all sides by steep escarpments and stands distinctly above a surrounding plain. Mesas characteristically consist of flat-lying soft sedimentary rocks capped by a more resistant layer or layers of harder rock, e.g. shales overlain by sand... | Physical sciences | Landforms | null |
386748 | https://en.wikipedia.org/wiki/Calcium%20hydroxide | Calcium hydroxide | Calcium hydroxide (traditionally called slaked lime) is an inorganic compound with the chemical formula Ca(OH)2. It is a colorless crystal or white powder and is produced when quicklime (calcium oxide) is mixed with water. Annually, approximately 125 million tons of calcium hydroxide are produced worldwide.
Calcium h... | Physical sciences | Hydroxy anion | Chemistry |
387038 | https://en.wikipedia.org/wiki/Interdictor | Interdictor | An interdictor is a type of attack aircraft or tactical bomber that operates far behind enemy lines, with the express intent of air interdiction of the enemy's military targets, most notably those involved in logistics.
Interdiction
Interdiction prevents or delays enemy forces and supplies from reaching the battlefro... | Technology | Military aviation | null |
387063 | https://en.wikipedia.org/wiki/Dwarf%20elliptical%20galaxy | Dwarf elliptical galaxy | Dwarf elliptical galaxies (dEs) are elliptical galaxies that are smaller than ordinary elliptical galaxies. They are quite common in galaxy groups and clusters, and are usually companions to other galaxies.
Examples
"Dwarf elliptical" galaxies should not be confused with the rare "compact elliptical" galaxy class, of... | Physical sciences | Galaxy classification | Astronomy |
387369 | https://en.wikipedia.org/wiki/Paleocene%E2%80%93Eocene%20Thermal%20Maximum | Paleocene–Eocene Thermal Maximum | The Paleocene–Eocene thermal maximum (PETM), alternatively ”Eocene thermal maximum 1 (ETM1)“ and formerly known as the "Initial Eocene" or “Late Paleocene thermal maximum", was a geologically brief time interval characterized by a 5–8 °C global average temperature rise and massive input of carbon into the ocean and atm... | Physical sciences | Events | Earth science |
387457 | https://en.wikipedia.org/wiki/Thermohaline%20circulation | Thermohaline circulation | Thermohaline circulation (THC) is a part of the large-scale ocean circulation that is driven by global density gradients created by surface heat and freshwater fluxes. The adjective thermohaline derives from thermo- referring to temperature and referring to salt content, factors which together determine the density of... | Physical sciences | Oceanography | null |
387512 | https://en.wikipedia.org/wiki/Dye%20laser | Dye laser | A dye laser is a laser that uses an organic dye as the lasing medium, usually as a liquid solution. Compared to gases and most solid state lasing media, a dye can usually be used for a much wider range of wavelengths, often spanning 50 to 100 nanometers or more. The wide bandwidth makes them particularly suitable for t... | Technology | Lasers | null |
387750 | https://en.wikipedia.org/wiki/Separation%20of%20variables | Separation of variables | In mathematics, separation of variables (also known as the Fourier method) is any of several methods for solving ordinary and partial differential equations, in which algebra allows one to rewrite an equation so that each of two variables occurs on a different side of the equation.
Ordinary differential equations (ODE... | Mathematics | Differential equations | null |
387797 | https://en.wikipedia.org/wiki/Asphalt%20concrete | Asphalt concrete | Asphalt concrete (commonly called asphalt, blacktop, or pavement in North America, and tarmac or bitumen macadam in the United Kingdom and the Republic of Ireland) is a composite material commonly used to surface roads, parking lots, airports, and the core of embankment dams. Asphalt mixtures have been used in pavement... | Technology | Building materials | null |
387924 | https://en.wikipedia.org/wiki/T-square | T-square | A T-square is a technical drawing instrument used by draftsmen primarily as a guide for drawing horizontal lines on a drafting table. The instrument is named after its resemblance to the letter T, with a long shaft called the "blade" and a short shaft called the "stock" or "head". T-squares are available in a range of ... | Technology | Artist's and drafting tools | null |
389564 | https://en.wikipedia.org/wiki/Quantitative%20research | Quantitative research | Quantitative research is a research strategy that focuses on quantifying the collection and analysis of data. It is formed from a deductive approach where emphasis is placed on the testing of theory, shaped by empiricist and positivist philosophies.
Associated with the natural, applied, formal, and social sciences thi... | Physical sciences | Research methods | Basics and measurement |
389950 | https://en.wikipedia.org/wiki/Diesel%20locomotive | Diesel locomotive | A diesel locomotive is a type of railway locomotive in which the power source is a diesel engine. Several types of diesel locomotives have been developed, differing mainly in the means by which mechanical power is conveyed to the driving wheels. The most common are diesel–electric locomotives and diesel–hydraulic.
Ear... | Technology | Rail and cable transport | null |
390066 | https://en.wikipedia.org/wiki/Tokyo%20Metro | Tokyo Metro | The Tokyo Metro (Japanese: , ) is a major rapid transit system in Tokyo, Japan, operated by the Tokyo Metro Co. With an average daily ridership of 6.52 million passengers (as of 2023), the Tokyo Metro is the larger of the two subway operators in the city; the other being the Toei Subway, with 2.85 million average daily... | Technology | Japan | null |
5822369 | https://en.wikipedia.org/wiki/Strobilus | Strobilus | A strobilus (: strobili) is a structure present on many land plant species consisting of sporangia-bearing structures densely aggregated along a stem. Strobili are often called cones, but some botanists restrict the use of the term cone to the woody seed strobili of conifers. Strobili are characterized by a central axi... | Biology and health sciences | Plant anatomy and morphology: General | Biology |
7604906 | https://en.wikipedia.org/wiki/Mantle%20convection | Mantle convection | Mantle convection is the very slow creep of Earth's solid silicate mantle as convection currents carry heat from the interior to the planet's surface. Mantle convection causes tectonic plates to move around the Earth's surface.
The Earth's lithosphere rides atop the asthenosphere, and the two form the components of th... | Physical sciences | Geophysics | Earth science |
195891 | https://en.wikipedia.org/wiki/Pneumatics | Pneumatics | Pneumatics (from Greek 'wind, breath') is the use of gas or pressurized air in mechanical systems.
Pneumatic systems used in industry are commonly powered by compressed air or compressed inert gases. A centrally located and electrically-powered compressor powers cylinders, air motors, pneumatic actuators, and other... | Technology | Hydraulics and pneumatics | null |
195947 | https://en.wikipedia.org/wiki/Function%20composition | Function composition | In mathematics, the composition operator takes two functions, and , and returns a new function . Thus, the function is applied after applying to .
Reverse composition, sometimes denoted , applies the operation in the opposite order, applying first and second. Intuitively, reverse composition is a chaining proc... | Mathematics | Basics | null |
195952 | https://en.wikipedia.org/wiki/Catamaran | Catamaran | A catamaran () (informally, a "cat") is a watercraft with two parallel hulls of equal size. The wide distance between a catamaran's hulls imparts stability through resistance to rolling and overturning; no ballast is required. Catamarans typically have less hull volume, smaller displacement, and shallower draft (draugh... | Technology | Naval transport | null |
196020 | https://en.wikipedia.org/wiki/Crocodilia | Crocodilia | Crocodylia () is an order of semiaquatic, predatory reptiles that are known as crocodilians. They first appeared during the Late Cretaceous and are the closest living relatives of birds. Crocodilians are a type of crocodylomorph pseudosuchian, a subset of archosaurs that appeared about 235 million years ago and were th... | Biology and health sciences | Reptiles | null |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.