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4404484 | https://en.wikipedia.org/wiki/Horned%20gopher | Horned gopher | Horned gophers are extinct rodents from the genus Ceratogaulus, a member of the extinct fossorial rodent clade Mylagaulidae. Ceratogaulus is the only known rodent genus with horns, and is the smallest known horned mammal. Ceratogaulus lived from the late Miocene to the early Pliocene epochs.
Description
The horned g... | Biology and health sciences | Rodents | Animals |
9884592 | https://en.wikipedia.org/wiki/Suspended%20load | Suspended load | The suspended load of a flow of fluid, such as a river, is the portion of its sediment uplifted by the fluid's flow in the process of sediment transportation. It is kept suspended by the fluid's turbulence. The suspended load generally consists of smaller particles, like clay, silt, and fine sands.
Sediment transporta... | Physical sciences | Sedimentology | Earth science |
9888598 | https://en.wikipedia.org/wiki/Nothofagus%20menziesii | Nothofagus menziesii | Nothofagus menziesii, commonly known as silver beech (), is a tree of the southern beech family endemic to New Zealand. Its common name probably comes from the fact that its bark is whitish in colour, particularly in younger specimens. It is found from Thames southwards in the North Island (except Mount Taranaki/Egmont... | Biology and health sciences | Fagales | Plants |
17910805 | https://en.wikipedia.org/wiki/Counting%20board | Counting board | The counting board is the precursor of the abacus, and the earliest known form of a counting device (excluding fingers and other very simple methods). Counting boards were made of stone or wood, and the counting was done on the board with beads, pebbles etc. Not many boards survive because of the perishable materials u... | Technology | Basics_4 | null |
3240142 | https://en.wikipedia.org/wiki/Agricultural%20cycle | Agricultural cycle | The agricultural cycle is the annual cycle of activities related to the growth and harvest of a crop (plant). These activities include loosening the soil, seeding, special watering, moving plants when they grow bigger, and harvesting, among others. Without these activities, a crop cannot be grown. The main steps for ag... | Technology | Basics_2 | null |
3241032 | https://en.wikipedia.org/wiki/Treehopper | Treehopper | Treehoppers (more precisely typical treehoppers to distinguish them from the Aetalionidae) and thorn bugs are members of the family Membracidae, a group of insects related to the cicadas and the leafhoppers. About 3,200 species of treehoppers in over 400 genera are known. They are found on all continents except Antarct... | Biology and health sciences | Hemiptera (true bugs) | Animals |
198766 | https://en.wikipedia.org/wiki/Greylag%20goose | Greylag goose | The greylag goose or graylag goose (Anser anser) is a species of large goose in the waterfowl family Anatidae and the type species of the genus Anser. It has mottled and barred grey and white plumage and an orange beak and pink legs. A large bird, it measures between in length, with an average weight of . Its distribu... | Biology and health sciences | Anseriformes | Animals |
198824 | https://en.wikipedia.org/wiki/Freezing | Freezing | Freezing is a phase transition in which a liquid turns into a solid when its temperature is lowered below its freezing point.
For most substances, the melting and freezing points are the same temperature; however, certain substances possess differing solid-liquid transition temperatures. For example, agar displays a h... | Physical sciences | Phase transitions | null |
198842 | https://en.wikipedia.org/wiki/Grassland | Grassland | A grassland is an area where the vegetation is dominated by grasses (Poaceae). However, sedge (Cyperaceae) and rush (Juncaceae) can also be found along with variable proportions of legumes, such as clover, and other herbs. Grasslands occur naturally on all continents except Antarctica and are found in most ecoregions o... | Physical sciences | Terrestrial features | null |
198843 | https://en.wikipedia.org/wiki/Savanna | Savanna | A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) biome and ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to support an unbroken herbaceous layer consisting primarily of grasse... | Physical sciences | Grasslands | null |
198984 | https://en.wikipedia.org/wiki/Electrical%20conductor | Electrical conductor | In physics and electrical engineering, a conductor is an object or type of material that allows the flow of charge (electric current) in one or more directions. Materials made of metal are common electrical conductors. The flow of negatively charged electrons generates electric current, positively charged holes, and po... | Physical sciences | Electrical circuits | Physics |
199013 | https://en.wikipedia.org/wiki/Snow%20goose | Snow goose | The snow goose (Anser caerulescens) is a species of goose native to North America. Both white and dark morphs exist, the latter often known as blue goose. Its name derives from the typically white plumage. The species was previously placed in the genus Chen, but is now typically included in the "gray goose" genus Anser... | Biology and health sciences | Anseriformes | Animals |
199040 | https://en.wikipedia.org/wiki/Chemical%20equation | Chemical equation | A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and chemical formulas. The reactant entities are given on the left-hand side and the product entities are on the right-hand side with a plus sign between the entities in both the reactants and the products, and an arrow tha... | Physical sciences | Chemical reactions | null |
199051 | https://en.wikipedia.org/wiki/Antisocial%20personality%20disorder | Antisocial personality disorder | Antisocial personality disorder (ASPD) is a personality disorder defined by a chronic pattern of behavior that disregards the rights and well-being of others. People with ASPD often exhibit behavior that conflicts with social norms, leading to issues with interpersonal relationships, employment, and legal matters. The ... | Biology and health sciences | Mental disorders | Health |
199077 | https://en.wikipedia.org/wiki/Period%202%20element | Period 2 element | A period 2 element is one of the chemical elements in the second row (or period) of the periodic table of the chemical elements. The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behavior of the elements as their atomic number increases; a new row is started when chemical ... | Physical sciences | Periods | Chemistry |
199079 | https://en.wikipedia.org/wiki/Period%201%20element | Period 1 element | A period 1 element is one of the chemical elements in the first row (or period) of the periodic table of the chemical elements. The periodic table is laid out in rows to illustrate periodic (recurring) trends in the chemical behaviour of the elements as their atomic number increases: a new row is begun when chemical be... | Physical sciences | Periods | Chemistry |
199081 | https://en.wikipedia.org/wiki/Period%207%20element | Period 7 element | A period 7 element is one of the chemical elements in the seventh row (or period) of the periodic table of the chemical elements. The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behavior of the elements as their atomic number increases: a new row is begun when chemical b... | Physical sciences | Periods | Chemistry |
199121 | https://en.wikipedia.org/wiki/Rydberg%20constant | Rydberg constant | In spectroscopy, the Rydberg constant, symbol for
heavy atoms or for hydrogen, named after the Swedish physicist Johannes Rydberg, is a physical constant relating to the electromagnetic spectra of an atom. The constant first arose as an empirical fitting parameter in the Rydberg formula for the hydrogen spectral ser... | Physical sciences | Atomic physics | Physics |
199189 | https://en.wikipedia.org/wiki/Bernoulli%20distribution | Bernoulli distribution | In probability theory and statistics, the Bernoulli distribution, named after Swiss mathematician Jacob Bernoulli, is the discrete probability distribution of a random variable which takes the value 1 with probability and the value 0 with probability . Less formally, it can be thought of as a model for the set of poss... | Mathematics | Probability | null |
199252 | https://en.wikipedia.org/wiki/Deserts%20and%20xeric%20shrublands | Deserts and xeric shrublands | Deserts and xeric shrublands are a biome defined by the World Wide Fund for Nature. Deserts and xeric (Ancient Greek 'dry') shrublands form the largest terrestrial biome, covering 19% of Earth's land surface area. Ecoregions in this habitat type vary greatly in the amount of annual rainfall they receive, usually less... | Physical sciences | Biomes: General | Earth science |
199304 | https://en.wikipedia.org/wiki/Amp%C3%A8re%27s%20circuital%20law | Ampère's circuital law | In classical electromagnetism, Ampère's circuital law (not to be confused with Ampère's force law) relates the circulation of a magnetic field around a closed loop to the electric current passing through the loop.
James Clerk Maxwell derived it using hydrodynamics in his 1861 published paper "On Physical Lines of For... | Physical sciences | Electrodynamics | Physics |
199516 | https://en.wikipedia.org/wiki/Beta%20vulgaris | Beta vulgaris | Beta vulgaris (beet) is a species of flowering plant in the subfamily Betoideae of the family Amaranthaceae. Economically, it is the most important crop of the large order Caryophyllales. It has several cultivar groups: the sugar beet, of greatest importance to produce table sugar; the root vegetable known as the beetr... | Biology and health sciences | Caryophyllales | Plants |
199534 | https://en.wikipedia.org/wiki/Ecdysozoa | Ecdysozoa | Ecdysozoa () is a group of protostome animals, including Arthropoda (insects, chelicerata (including arachnids), crustaceans, and myriapods), Nematoda, and several smaller phyla. The grouping of these animal phyla into a single clade was first proposed by Eernisse et al. (1992) based on a phylogenetic analysis of 141 m... | Biology and health sciences | Ecdysozoa | Animals |
199556 | https://en.wikipedia.org/wiki/Taxon | Taxon | In biology, a taxon (back-formation from taxonomy; : taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes es... | Biology and health sciences | Phylogenetics and taxonomy | Biology |
199661 | https://en.wikipedia.org/wiki/Rock%20%28geology%29 | Rock (geology) | In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition, and the way in which it is formed. Rocks form the Earth's outer solid layer, the crust, and most of its interior, except for the liquid o... | Physical sciences | Earth science | null |
199665 | https://en.wikipedia.org/wiki/Helicobacter%20pylori | Helicobacter pylori | Helicobacter pylori, previously known as Campylobacter pylori, is a gram-negative, flagellated, helical bacterium. Mutants can have a rod or curved rod shape that exhibits less virulence. Its helical body (from which the genus name Helicobacter derives) is thought to have evolved to penetrate the mucous lining of the s... | Biology and health sciences | Gram-negative bacteria | Plants |
199829 | https://en.wikipedia.org/wiki/Angular%20frequency | Angular frequency | In physics, angular frequency (symbol ω), also called angular speed and angular rate, is a scalar measure of the angle rate (the angle per unit time) or the temporal rate of change of the phase argument of a sinusoidal waveform or sine function (for example, in oscillations and waves).
Angular frequency (or angular spe... | Physical sciences | Classical mechanics | Physics |
199865 | https://en.wikipedia.org/wiki/Snipe | Snipe | A snipe is any of about 26 wading bird species in three genera in the family Scolopacidae. They are characterized by a very long, slender bill, eyes placed high on the head, and cryptic/camouflaging plumage. The Gallinago snipes have a nearly worldwide distribution, the Lymnocryptes snipe is restricted to Asia and Euro... | Biology and health sciences | Charadriiformes | Animals |
199882 | https://en.wikipedia.org/wiki/Wedge-tailed%20eagle | Wedge-tailed eagle | The wedge-tailed eagle (Aquila audax) also known as the eaglehawk, is the largest bird of prey in the continent of Australia. It is also found in southern New Guinea to the north and is distributed as far south as the state of Tasmania. Adults of the species have long, broad wings, fully feathered legs, an unmistakable... | Biology and health sciences | Accipitrimorphae | Animals |
200006 | https://en.wikipedia.org/wiki/Epoch%20%28astronomy%29 | Epoch (astronomy) | In astronomy, an epoch or reference epoch is a moment in time used as a reference point for some time-varying astronomical quantity. It is useful for the celestial coordinates or orbital elements of a celestial body, as they are subject to perturbations and vary with time. These time-varying astronomical quantities mig... | Physical sciences | Celestial sphere: General | Astronomy |
200011 | https://en.wikipedia.org/wiki/Red%20supergiant | Red supergiant | Red supergiants (RSGs) are stars with a supergiant luminosity class (Yerkes class I) and a stellar classification K or M. They are the largest stars in the universe in terms of volume, although they are not the most massive or luminous. Betelgeuse and Antares A are the brightest and best known red supergiants (RSGs), i... | Physical sciences | Stellar astronomy | Astronomy |
200091 | https://en.wikipedia.org/wiki/Quadratic%20residue | Quadratic residue | In number theory, an integer q is a quadratic residue modulo n if it is congruent to a perfect square modulo n; that is, if there exists an integer x such that
Otherwise, q is a quadratic nonresidue modulo n.
Quadratic residues are used in applications ranging from acoustical engineering to cryptography and the fact... | Mathematics | Modular arithmetic | null |
200115 | https://en.wikipedia.org/wiki/Trajectory | Trajectory | A trajectory or flight path is the path that an object with mass in motion follows through space as a function of time. In classical mechanics, a trajectory is defined by Hamiltonian mechanics via canonical coordinates; hence, a complete trajectory is defined by position and momentum, simultaneously.
The mass might be... | Physical sciences | Classical mechanics | Physics |
200129 | https://en.wikipedia.org/wiki/Hair%20loss | Hair loss | Hair loss, also known as alopecia or baldness, refers to a loss of hair from part of the head or body. Typically at least the head is involved. The severity of hair loss can vary from a small area to the entire body. Inflammation or scarring is not usually present. Hair loss in some people causes psychological distress... | Biology and health sciences | Health and fitness: General | Health |
200136 | https://en.wikipedia.org/wiki/Static%20electricity | Static electricity | Static electricity is an imbalance of electric charges within or on the surface of a material. The charge remains until it can move away by an electric current or electrical discharge. The word "static" is used to differentiate it from current electricity, where an electric charge flows through an electrical conductor.... | Physical sciences | Electrostatics | Physics |
200167 | https://en.wikipedia.org/wiki/Water%20cycle | Water cycle | The water cycle (or hydrologic cycle or hydrological cycle) is a biogeochemical cycle that involves the continuous movement of water on, above and below the surface of the Earth. The mass of water on Earth remains fairly constant over time. However, the partitioning of the water into the major reservoirs of ice, fresh ... | Physical sciences | Hydrology | null |
200199 | https://en.wikipedia.org/wiki/Remora | Remora | The remora (), sometimes called suckerfish or sharksucker, is any of a family (Echeneidae) of ray-finned fish in the order Carangiformes. Depending on species, they grow to long. Their distinctive first dorsal fins take the form of a modified oval, sucker-like organ with slat-like structures that open and close to cr... | Biology and health sciences | Acanthomorpha | null |
200237 | https://en.wikipedia.org/wiki/Eurasian%20eagle-owl | Eurasian eagle-owl | The Eurasian eagle-owl (Bubo bubo) is a species of eagle-owl, a type of bird that resides in much of Eurasia. It is often just called the eagle-owl in Europe and Asia.
It is one of the largest species of owl. Females can grow to a total length of , with a wingspan of . Males are slightly smaller. This bird has distinc... | Biology and health sciences | Strigiformes | null |
200310 | https://en.wikipedia.org/wiki/Sodium%20nitrate | Sodium nitrate | Sodium nitrate is the chemical compound with the formula . This alkali metal nitrate salt is also known as Chile saltpeter (large deposits of which were historically mined in Chile) to distinguish it from ordinary saltpeter, potassium nitrate. The mineral form is also known as nitratine, nitratite or soda niter.
Sodiu... | Physical sciences | Salts | null |
200341 | https://en.wikipedia.org/wiki/Megapode | Megapode | The megapodes, also known as incubator birds or mound-builders, are stocky, medium-large, chicken-like birds with small heads and large feet in the family Megapodiidae. Their name literally means "large foot" and is a reference to the heavy legs and feet typical of these terrestrial birds. All are browsers, and all exc... | Biology and health sciences | Galliformes | Animals |
200421 | https://en.wikipedia.org/wiki/Little%20owl | Little owl | The little owl (Athene noctua), also known as the owl of Athena or owl of Minerva, is a bird that inhabits much of the temperate and warmer parts of Europe, the Palearctic east to Korea, and North Africa. It was introduced into Britain at the end of the 19th century and into the South Island of New Zealand in the early... | Biology and health sciences | Strigiformes | Animals |
200458 | https://en.wikipedia.org/wiki/Reflexive%20relation | Reflexive relation | In mathematics, a binary relation on a set is reflexive if it relates every element of to itself.
An example of a reflexive relation is the relation "is equal to" on the set of real numbers, since every real number is equal to itself. A reflexive relation is said to have the reflexive property or is said to posse... | Mathematics | Set theory | null |
200459 | https://en.wikipedia.org/wiki/Symmetric%20relation | Symmetric relation | A symmetric relation is a type of binary relation. Formally, a binary relation R over a set X is symmetric if:
where the notation aRb means that .
An example is the relation "is equal to", because if is true then is also true. If RT represents the converse of R, then R is symmetric if and only if .
Symmetry, alon... | Mathematics | Set theory | null |
200463 | https://en.wikipedia.org/wiki/Transitive%20relation | Transitive relation | In mathematics, a binary relation on a set is transitive if, for all elements , , in , whenever relates to and to , then also relates to .
Every partial order and every equivalence relation is transitive. For example, less than and equality among real numbers are both transitive: If and then ; and if and ... | Mathematics | Set theory | null |
200485 | https://en.wikipedia.org/wiki/Muslin | Muslin | Muslin () is a cotton fabric of plain weave. It is made in a wide range of weights from delicate sheers to coarse sheeting. It is commonly believed that it gets its name from the city of Mosul, Iraq.
Muslin was produced in different regions of the Indian subcontinent; Bengal Region was the main manufacturing area and ... | Technology | Fabrics and fibers | null |
200646 | https://en.wikipedia.org/wiki/Selective%20breeding | Selective breeding | Selective breeding (also called artificial selection) is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits (characteristics) by choosing which typically animal or plant males and females will sexually reproduce and have offspring together. Domesticate... | Technology | Animal husbandry | null |
200672 | https://en.wikipedia.org/wiki/Lycopodiaceae | Lycopodiaceae | The Lycopodiaceae (class Lycopodiopsida, order Lycopodiales) are an old family of vascular plants, including all of the core clubmosses and firmosses, comprising 16 accepted genera and about 400 known species. This family originated about 380 million years ago in the early Devonian, though the diversity within the fami... | Biology and health sciences | Lycophytes | Plants |
200716 | https://en.wikipedia.org/wiki/Barycenter%20%28astronomy%29 | Barycenter (astronomy) | In astronomy, the barycenter (or barycentre; ) is the center of mass of two or more bodies that orbit one another and is the point about which the bodies orbit. A barycenter is a dynamical point, not a physical object. It is an important concept in fields such as astronomy and astrophysics. The distance from a body's c... | Physical sciences | Celestial mechanics | null |
201008 | https://en.wikipedia.org/wiki/Confederation%20Bridge | Confederation Bridge | The Confederation Bridge () is a box girder bridge carrying the Trans-Canada Highway across the Abegweit Passage of the Northumberland Strait, linking the province of Prince Edward Island with the mainland province of New Brunswick. Opened on May 31, 1997, the bridge is Canada's longest bridge and the world's longest ... | Technology | Bridges | null |
201017 | https://en.wikipedia.org/wiki/Budgerigar | Budgerigar | The budgerigar ( ; Melopsittacus undulatus), also known as the common parakeet, shell parakeet or budgie ( ), is a small, long-tailed, seed-eating parrot native to Australia. Naturally the species is green and yellow with black, scalloped markings on the nape, back, and wings. Budgies are bred in captivity with colour... | Biology and health sciences | Psittaciformes | null |
201022 | https://en.wikipedia.org/wiki/Bell%20number | Bell number | In combinatorial mathematics, the Bell numbers count the possible partitions of a set. These numbers have been studied by mathematicians since the 19th century, and their roots go back to medieval Japan. In an example of Stigler's law of eponymy, they are named after Eric Temple Bell, who wrote about them in the 1930s.... | Mathematics | Sequences | null |
201154 | https://en.wikipedia.org/wiki/Divide-and-conquer%20algorithm | Divide-and-conquer algorithm | In computer science, divide and conquer is an algorithm design paradigm. A divide-and-conquer algorithm recursively breaks down a problem into two or more sub-problems of the same or related type, until these become simple enough to be solved directly. The solutions to the sub-problems are then combined to give a solut... | Mathematics | Algorithms | null |
201246 | https://en.wikipedia.org/wiki/True%20parrot | True parrot | The true parrots are about 350 species of hook-billed, mostly herbivorous birds forming the superfamily Psittacoidea, one of the three superfamilies in the biological order Psittaciformes (parrots). True parrots are widespread, with species in Mexico, Central and South America, sub-Saharan Africa, India, Southeast Asia... | Biology and health sciences | Psittaciformes | Animals |
201258 | https://en.wikipedia.org/wiki/Cockatoo | Cockatoo | A cockatoo is any of the 21 species of parrots belonging to the family Cacatuidae, the only family in the superfamily Cacatuoidea. Along with the Psittacoidea (true parrots) and the Strigopoidea (large New Zealand parrots), they make up the order Psittaciformes. The family has a mainly Australasian distribution, rangin... | Biology and health sciences | Psittaciformes | null |
201268 | https://en.wikipedia.org/wiki/RNA%20polymerase | RNA polymerase | In molecular biology, RNA polymerase (abbreviated RNAP or RNApol), or more specifically DNA-directed/dependent RNA polymerase (DdRP), is an enzyme that catalyzes the chemical reactions that synthesize RNA from a DNA template.
Using the enzyme helicase, RNAP locally opens the double-stranded DNA so that one strand of... | Biology and health sciences | Molecular biology | Biology |
201359 | https://en.wikipedia.org/wiki/Squaring%20the%20circle | Squaring the circle | Squaring the circle is a problem in geometry first proposed in Greek mathematics. It is the challenge of constructing a square with the area of a given circle by using only a finite number of steps with a compass and straightedge. The difficulty of the problem raised the question of whether specified axioms of Euclidea... | Mathematics | Euclidean geometry | null |
201360 | https://en.wikipedia.org/wiki/Eomaia | Eomaia | Eomaia ("dawn mother") is a genus of extinct fossil mammals containing the single species Eomaia scansoria, discovered in rocks that were found in the Yixian Formation, Liaoning Province, China, and dated to the Barremian Age of the Lower Cretaceous about . The single fossil specimen of this species is in length and v... | Biology and health sciences | Stem-mammals | Animals |
201400 | https://en.wikipedia.org/wiki/Hindu%20calendar | Hindu calendar | The Hindu calendar, also called Panchanga (), is one of various lunisolar calendars that are traditionally used in the Indian subcontinent and Southeast Asia, with further regional variations for social and Hindu religious purposes. They adopt a similar underlying concept for timekeeping based on sidereal year for sola... | Technology | Calendars | null |
201415 | https://en.wikipedia.org/wiki/Quercus%20robur | Quercus robur | </noinclude>
Quercus robur, the pedunculate oak or English oak, is a species of flowering plant in the beech and oak family, Fagaceae. It is a large tree, native to most of Europe and western Asia, and is widely cultivated in other temperate regions. It grows on soils of near neutral acidity in the lowlands and is not... | Biology and health sciences | Fagales | Plants |
201474 | https://en.wikipedia.org/wiki/Hatchback | Hatchback | A hatchback is a car body configuration with a rear door that swings upward to provide access to the main interior of the car as a cargo area rather than just to a separated trunk. Hatchbacks may feature fold-down second-row seating, where the interior can be reconfigured to prioritize passenger or cargo volume.
While... | Technology | Motorized road transport | null |
201479 | https://en.wikipedia.org/wiki/Syngas | Syngas | Syngas, or synthesis gas, is a mixture of hydrogen and carbon monoxide, in various ratios. The gas often contains some carbon dioxide and methane. It is principally used for producing ammonia or methanol. Syngas is combustible and can be used as a fuel. Historically, it has been used as a replacement for gasoline, w... | Physical sciences | Chemical mixtures: General | null |
201485 | https://en.wikipedia.org/wiki/Lithium-ion%20battery | Lithium-ion battery | A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li+ ions into electronically conducting solids to store energy. In comparison with other commercial rechargeable batteries, Li-ion batteries are characterized by higher specific energy, higher energy density, hi... | Technology | Energy storage | null |
201487 | https://en.wikipedia.org/wiki/Rechargeable%20battery | Rechargeable battery | A rechargeable battery, storage battery, or secondary cell (formally a type of energy accumulator), is a type of electrical battery which can be charged, discharged into a load, and recharged many times, as opposed to a disposable or primary battery, which is supplied fully charged and discarded after use. It is compos... | Technology | Energy storage | null |
201495 | https://en.wikipedia.org/wiki/Lead%E2%80%93acid%20battery | Lead–acid battery | The lead–acid battery is a type of rechargeable battery first invented in 1859 by French physicist Gaston Planté. It is the first type of rechargeable battery ever created. Compared to modern rechargeable batteries, lead–acid batteries have relatively low energy density. Despite this, they are able to supply high surge... | Technology | Energy storage | null |
18962267 | https://en.wikipedia.org/wiki/Axe | Axe | An axe (; sometimes spelled ax in American English; see spelling differences) is an implement that has been used for millennia to shape, split, and cut wood, to harvest timber, as a weapon, and as a ceremonial or heraldic symbol. The axe has many forms and specialised uses but generally consists of an axe head with a h... | Technology | Hand tools | null |
18963754 | https://en.wikipedia.org/wiki/Viscosity | Viscosity | Viscosity is a measure of a fluid's rate-dependent resistance to a change in shape or to movement of its neighboring portions relative to one another. For liquids, it corresponds to the informal concept of thickness; for example, syrup has a higher viscosity than water. Viscosity is defined scientifically as a force mu... | Physical sciences | Fluid mechanics | null |
18963787 | https://en.wikipedia.org/wiki/Ion | Ion | An ion () is an atom or molecule with a net electrical charge. The charge of an electron is considered to be negative by convention and this charge is equal and opposite to the charge of a proton, which is considered to be positive by convention. The net charge of an ion is not zero because its total number of electron... | Physical sciences | Atomic physics | null |
2355918 | https://en.wikipedia.org/wiki/Ethnobiology | Ethnobiology | Ethnobiology is the multidisciplinary field of study of relationships among peoples, biota, and environments integrating many perspectives, from the social, biological, and medical sciences; along with application to conservation and sustainable development. The diversity of perspectives in ethnobiology allows for exa... | Biology and health sciences | Biology basics | Biology |
2356196 | https://en.wikipedia.org/wiki/C%20Sharp%20%28programming%20language%29 | C Sharp (programming language) | C# ( ) is a general-purpose high-level programming language supporting multiple paradigms. C# encompasses static typing, strong typing, lexically scoped, imperative, declarative, functional, generic, object-oriented (class-based), and component-oriented programming disciplines.
The principal inventors of the C# progra... | Technology | Programming languages | null |
2356987 | https://en.wikipedia.org/wiki/Tapinoma%20sessile | Tapinoma sessile | Tapinoma sessile is a species of small ant that goes by the common names odorous house ant, sugar ant, stink ant, and coconut ant. Their colonies are polydomous (consisting of multiple nests) and polygynous (containing multiple reproducing queens). Like many social insects, T. sessile employs complex foraging strategie... | Biology and health sciences | Hymenoptera | Animals |
2359857 | https://en.wikipedia.org/wiki/Dunkleosteus | Dunkleosteus | Dunkleosteus is an extinct genus of large arthrodire ("jointed-neck") fish that existed during the Late Devonian period, about 382–358 million years ago. It was a pelagic fish inhabiting open waters, and one of the first vertebrate apex predators of any ecosystem.
Dunkleosteus consists of ten species, some of which ar... | Biology and health sciences | Prehistoric fish | Animals |
2361264 | https://en.wikipedia.org/wiki/Dryopithecus | Dryopithecus | Dryopithecus is a genus of extinct great apes from the middle–late Miocene boundary of Europe 12.5 to 11.1 million years ago (mya). Since its discovery in 1856, the genus has been subject to taxonomic turmoil, with numerous new species being described from single remains based on minute differences amongst each other, ... | Biology and health sciences | Apes | Animals |
5843526 | https://en.wikipedia.org/wiki/Potoroo | Potoroo | Potoroo is a common name for species of Potorous, a genus of smaller marsupials. They are allied to the Macropodiformes, the suborder of kangaroo, wallaby, and other rat-kangaroo genera and is the only genus in the tribe Potoroini. All three extant species are threatened by ecological changes since the colonisation of ... | Biology and health sciences | Diprotodontia | Animals |
5843584 | https://en.wikipedia.org/wiki/Cross-bedding | Cross-bedding | In geology, cross-bedding, also known as cross-stratification, is layering within a stratum and at an angle to the main bedding plane. The sedimentary structures which result are roughly horizontal units composed of inclined layers. The original depositional layering is tilted, such tilting not being the result of post... | Physical sciences | Sedimentology | Earth science |
5843783 | https://en.wikipedia.org/wiki/Ripple%20marks | Ripple marks | In geology, ripple marks are sedimentary structures (i.e., bedforms of the lower flow regime) and indicate agitation by water (current or waves) or directly by wind.
Defining ripple cross-laminae and asymmetric ripples
Current ripple marks, unidirectional ripples, or asymmetrical ripple marks are asymmetrical in pr... | Physical sciences | Sedimentology | Earth science |
5843907 | https://en.wikipedia.org/wiki/Graded%20bedding | Graded bedding | In geology, a graded bed is a bed characterized by a systematic change in grain or clast size from bottom to top of the bed. Most commonly this takes the form of normal grading, with coarser sediments at the base, which grade upward into progressively finer ones. Such a bed is also described as fining upward. Normally ... | Physical sciences | Sedimentology | Earth science |
5845425 | https://en.wikipedia.org/wiki/Gros%20Michel | Gros Michel | Gros Michel (), often translated and known as "Big Mike", is an export cultivar of banana and was, until the 1950s, the main variety grown. The physical properties of the Gros Michel make it an excellent export produce; its thick peel makes it resilient to bruising during transport and the dense bunches that it grows i... | Biology and health sciences | Tropical and tropical-like fruit | Plants |
5845712 | https://en.wikipedia.org/wiki/All-pass%20filter | All-pass filter | An all-pass filter is a signal processing filter that passes all frequencies equally in gain, but changes the phase relationship among various frequencies. Most types of filter reduce the amplitude (i.e. the magnitude) of the signal applied to it for some values of frequency, whereas the all-pass filter allows all freq... | Technology | Signal processing | null |
12284396 | https://en.wikipedia.org/wiki/Liver%20cancer | Liver cancer | Liver cancer, also known as hepatic cancer, primary hepatic cancer, or primary hepatic malignancy, is cancer that starts in the liver. Liver cancer can be primary in which the cancer starts in the liver, or it can be liver metastasis, or secondary, in which the cancer spreads from elsewhere in the body to the liver. Li... | Biology and health sciences | Cancer | Health |
7635377 | https://en.wikipedia.org/wiki/Barium%20peroxide | Barium peroxide | Barium peroxide is an inorganic compound with the formula . This white solid (gray when impure) is one of the most common inorganic peroxides, and it was the first peroxide compound discovered. Being an oxidizer and giving a vivid green colour upon ignition (as do all barium compounds), it finds some use in fireworks; ... | Physical sciences | Peroxide salts | Chemistry |
18969769 | https://en.wikipedia.org/wiki/CP%20violation | CP violation | In particle physics, CP violation is a violation of CP-symmetry (or charge conjugation parity symmetry): the combination of C-symmetry (charge conjugation symmetry) and P-symmetry (parity symmetry). CP-symmetry states that the laws of physics should be the same if a particle is interchanged with its antiparticle (C-sym... | Physical sciences | Particle physics: General | Physics |
665891 | https://en.wikipedia.org/wiki/Thrashing%20%28computer%20science%29 | Thrashing (computer science) | In computer science, thrashing occurs in a system with virtual memory when a computer's real storage resources are overcommitted, leading to a constant state of paging and page faults, slowing most application-level processing. This causes the performance of the computer to degrade or even collapse. The situation can c... | Technology | Operating systems | null |
665909 | https://en.wikipedia.org/wiki/Injection%20%28medicine%29 | Injection (medicine) | An injection (often and usually referred to as a "shot" in US English, a "jab" in UK English, or a "jag" in Scottish English and Scots) is the act of administering a liquid, especially a drug, into a person's body using a needle (usually a hypodermic needle) and a syringe. An injection is considered a form of parentera... | Biology and health sciences | General concepts_2 | Health |
665951 | https://en.wikipedia.org/wiki/Deterministic%20algorithm | Deterministic algorithm | In computer science, a deterministic algorithm is an algorithm that, given a particular input, will always produce the same output, with the underlying machine always passing through the same sequence of states. Deterministic algorithms are by far the most studied and familiar kind of algorithm, as well as one of the m... | Mathematics | Algorithms | null |
666401 | https://en.wikipedia.org/wiki/Triclinic%20crystal%20system | Triclinic crystal system | In crystallography, the triclinic (or anorthic) crystal system is one of the seven crystal systems. A crystal system is described by three basis vectors. In the triclinic system, the crystal is described by vectors of unequal length, as in the orthorhombic system. In addition, the angles between these vectors must all ... | Physical sciences | Crystallography | Physics |
666697 | https://en.wikipedia.org/wiki/Cubic%20crystal%20system | Cubic crystal system | In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals.
There are three main varieties of these crystals:
Primitive cubic (abbreviated cP and alternatively called si... | Physical sciences | Crystallography | Physics |
667206 | https://en.wikipedia.org/wiki/Touchscreen | Touchscreen | A touchscreen (or touch screen) is a type of display that can detect touch input from a user. It consists of both an input device (a touch panel) and an output device (a visual display). The touch panel is typically layered on the top of the electronic visual display of a device. Touchscreens are commonly found in smar... | Technology | User interface | null |
668700 | https://en.wikipedia.org/wiki/Erythritol | Erythritol | Erythritol (, ) is an organic compound, the naturally occurring achiral meso four-carbon sugar alcohol (or polyol). It is the reduced form of either D- or L-erythrose and one of the two reduced forms of erythrulose. It is used as a food additive and sugar substitute. It is synthesized from corn using enzymes and fermen... | Physical sciences | Sugar alcohols | Chemistry |
669733 | https://en.wikipedia.org/wiki/Die%20casting | Die casting | Die casting is a metal casting process that is characterized by forcing molten metal under high pressure into a mold cavity. The mold cavity is created using two hardened tool steel dies which have been machined into shape and work similarly to an injection mold during the process. Most die castings are made from non-f... | Technology | Metallurgy | null |
669746 | https://en.wikipedia.org/wiki/Park%20and%20ride | Park and ride | A park and ride, also known as incentive parking or a commuter lot, is a parking lot with public transport connections that allows commuters and other people heading to city centres to leave their vehicles and transfer to a bus, rail system (rapid transit, light rail, or commuter rail), or carpool for the remainder of ... | Technology | Concepts of ground transport | null |
4410074 | https://en.wikipedia.org/wiki/Soil%20acidification | Soil acidification | Soil acidification is the buildup of hydrogen cations, which reduces the soil pH. Chemically, this happens when a proton donor gets added to the soil. The donor can be an acid, such as nitric acid, sulfuric acid, or carbonic acid. It can also be a compound such as aluminium sulfate, which reacts in the soil to release ... | Physical sciences | Soil science | Earth science |
4410985 | https://en.wikipedia.org/wiki/Port%20of%20Rotterdam | Port of Rotterdam | The Port of Rotterdam is the largest seaport in Europe, and the world's largest seaport outside of Asia, located in and near the city of Rotterdam, in the province of South Holland in the Netherlands. From 1962 until 2004, it was the world's busiest port by annual cargo tonnage. It was overtaken first in 2004 by the po... | Technology | Specific piers and ports | null |
1691376 | https://en.wikipedia.org/wiki/Amazon%20Web%20Services | Amazon Web Services | Amazon Web Services, Inc. (AWS) is a subsidiary of Amazon that provides on-demand cloud computing platforms and APIs to individuals, companies, and governments, on a metered, pay-as-you-go basis. Clients will often use this in combination with autoscaling (a process that allows a client to use more computing in times o... | Technology | Cloud server | null |
1692055 | https://en.wikipedia.org/wiki/Oxygen%20difluoride | Oxygen difluoride | Oxygen difluoride is a chemical compound with the formula . As predicted by VSEPR theory, the molecule adopts a bent molecular geometry. It is a strong oxidizer and has attracted attention in rocketry for this reason. With a boiling point of −144.75 °C, OF2 is the most volatile (isolable) triatomic compound. The compou... | Physical sciences | Covalent oxides | Chemistry |
1694357 | https://en.wikipedia.org/wiki/Bikont | Bikont | A bikont ("two flagella") is any of the eukaryotic organisms classified in the group Bikonta. Many single-celled and multi-celled organisms are members of the group, and these, as well as the presumed ancestor, have two flagella.
Enzymes
Another shared trait of bikonts is the fusion of two genes into a single unit: th... | Biology and health sciences | Bikonts | Plants |
17917891 | https://en.wikipedia.org/wiki/Durian | Durian | The durian () is the edible fruit of several tree species belonging to the genus Durio. There are 30 recognized species, at least nine of which produce edible fruit. Durio zibethinus, native to Borneo and Sumatra, is the only species available on the international market. It has over 300 named varieties in Thailand and... | Biology and health sciences | Others | null |
18973446 | https://en.wikipedia.org/wiki/Geometry | Geometry | Geometry (; ) is a branch of mathematics concerned with properties of space such as the distance, shape, size, and relative position of figures. Geometry is, along with arithmetic, one of the oldest branches of mathematics. A mathematician who works in the field of geometry is called a geometer. Until the 19th century,... | Mathematics | Mathematics | null |
18973622 | https://en.wikipedia.org/wiki/Leaf | Leaf | A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, flower, and fruit collectively form the shoot system. In most leaves, the primary p... | Biology and health sciences | Plant: General | null |
18973752 | https://en.wikipedia.org/wiki/Coccinellidae | Coccinellidae | Coccinellidae () is a widespread family of small beetles. They are commonly known as ladybugs in North America and ladybirds in the United Kingdom; "lady" refers to mother Mary. Entomologists use the names ladybird beetles or lady beetles to avoid confusion with true bugs. The more than 6,000 described species have a g... | Biology and health sciences | Beetles (Coleoptera) | null |
18973869 | https://en.wikipedia.org/wiki/Psychiatry | Psychiatry | Psychiatry is the medical specialty devoted to the diagnosis, prevention, and treatment of deleterious mental conditions. These include various matters related to mood, behaviour, cognition, perceptions, and emotions.
Initial psychiatric assessment of a person begins with creating a case history and conducting a menta... | Biology and health sciences | Fields of medicine | null |
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