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152547 | https://en.wikipedia.org/wiki/Bisection | Bisection | In geometry, bisection is the division of something into two equal or congruent parts (having the same shape and size). Usually it involves a bisecting line, also called a bisector. The most often considered types of bisectors are the segment bisector, a line that passes through the midpoint of a given segment, and the... | Mathematics | Other | null |
152561 | https://en.wikipedia.org/wiki/Rutabaga | Rutabaga | Rutabaga (; North American English) or swede (English and some Commonwealth English) is a root vegetable, a form of Brassica napus (which also includes rapeseed). Other names include Swedish turnip, neep (Scots), and turnip (Scottish and Canadian English, Irish English and Manx English, as well as some dialects of Eng... | Biology and health sciences | Brassicales | null |
152611 | https://en.wikipedia.org/wiki/Cellular%20differentiation | Cellular differentiation | Cellular differentiation is the process in which a stem cell changes from one type to a differentiated one. Usually, the cell changes to a more specialized type. Differentiation happens multiple times during the development of a multicellular organism as it changes from a simple zygote to a complex system of tissues an... | Biology and health sciences | Cell processes | Biology |
152623 | https://en.wikipedia.org/wiki/Radiology | Radiology | Radiology ( ) is the medical specialty that uses medical imaging to diagnose diseases and guide treatment within the bodies of humans and other animals. It began with radiography (which is why its name has a root referring to radiation), but today it includes all imaging modalities. This includes technologies that use ... | Biology and health sciences | Fields of medicine | null |
152630 | https://en.wikipedia.org/wiki/Speleology | Speleology | Speleology () is the scientific study of caves and other karst features, as well as their composition, structure, physical properties, history, ecology, and the processes by which they form (speleogenesis) and change over time (speleomorphology). The term speleology is also sometimes applied to the recreational activit... | Physical sciences | Caves | Earth science |
152654 | https://en.wikipedia.org/wiki/Electrical%20connector | Electrical connector | Components of an electrical circuit are electrically connected if an electric current can run between them through an electrical conductor. An electrical connector is an electromechanical device used to create an electrical connection between parts of an electrical circuit, or between different electrical circuits, the... | Technology | Components | null |
152664 | https://en.wikipedia.org/wiki/Loop%20quantum%20gravity | Loop quantum gravity | Loop quantum gravity (LQG) is a theory of quantum gravity that incorporates matter of the Standard Model into the framework established for the intrinsic quantum gravity case. It is an attempt to develop a quantum theory of gravity based directly on Albert Einstein's geometric formulation rather than the treatment of g... | Physical sciences | Quantum mechanics | Physics |
152671 | https://en.wikipedia.org/wiki/Z3%20%28computer%29 | Z3 (computer) | The Z3 was a German electromechanical computer designed by Konrad Zuse in 1938, and completed in 1941. It was the world's first working programmable, fully automatic digital computer. The Z3 was built with 2,600 relays, implementing a 22-bit word length that operated at a clock frequency of about 5–10 Hz. Program code ... | Technology | Early computers | null |
152690 | https://en.wikipedia.org/wiki/Hovercraft | Hovercraft | A hovercraft (: hovercraft), also known as an air-cushion vehicle or ACV, is an amphibious craft capable of travelling over land, water, mud, ice, and various other surfaces.
Hovercraft use blowers to produce a large volume of air below the hull, or air cushion, that is slightly above atmospheric pressure. The pressur... | Technology | Maritime transport | null |
152692 | https://en.wikipedia.org/wiki/Tractor | Tractor | A tractor is an engineering vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery such as that used in agriculture, mining or construction. Most commonly, the term is used to describe a farm vehicle that provides the power and tra... | Technology | Other | null |
152710 | https://en.wikipedia.org/wiki/Sculptor%20%28constellation%29 | Sculptor (constellation) | Sculptor is a faint constellation in the southern sky. It represents a sculptor. It was introduced by Nicolas Louis de Lacaille in the 18th century. He originally named it Apparatus Sculptoris (the sculptor's studio), but the name was later shortened.
History
The region to the south of Cetus and Aquarius had been nam... | Physical sciences | Other | Astronomy |
152772 | https://en.wikipedia.org/wiki/Intensive%20farming | Intensive farming | Intensive agriculture, also known as intensive farming (as opposed to extensive farming), conventional, or industrial agriculture, is a type of agriculture, both of crop plants and of animals, with higher levels of input and output per unit of agricultural land area. It is characterized by a low fallow ratio, higher us... | Technology | Forms | null |
152776 | https://en.wikipedia.org/wiki/Organ%20%28biology%29 | Organ (biology) | In a multicellular organism, an organ is a collection of tissues joined in a structural unit to serve a common function. In the hierarchy of life, an organ lies between tissue and an organ system. Tissues are formed from same type cells to act together in a function. Tissues of different types combine to form an organ ... | Biology and health sciences | Basics_2 | null |
152952 | https://en.wikipedia.org/wiki/Portuguese%20man%20o%27%20war | Portuguese man o' war | The Portuguese war (Physalia physalis), also known as the man-of-war or bluebottle, is a marine hydrozoan found in the Atlantic Ocean and the Indian Ocean. It is considered to be the same species as the Pacific man o' war or bluebottle, which is found mainly in the Pacific Ocean. The Portuguese man o' war is the only ... | Biology and health sciences | Cnidarians | Animals |
152969 | https://en.wikipedia.org/wiki/Eutectic%20system | Eutectic system | A eutectic system or eutectic mixture ( ) is a type of a homogeneous mixture that has a melting point lower than those of the constituents. The lowest possible melting point over all of the mixing ratios of the constituents is called the eutectic temperature. On a phase diagram, the eutectic temperature is seen as the ... | Physical sciences | Phase separations | Chemistry |
152970 | https://en.wikipedia.org/wiki/Euglenid | Euglenid | Euglenids or euglenoids are one of the best-known groups of eukaryotic flagellates: single-celled organisms with flagella, or whip-like tails. They are classified in the phylum Euglenophyta, class Euglenida or Euglenoidea. Euglenids are commonly found in fresh water, especially when it is rich in organic materials, but... | Biology and health sciences | Excavata | Plants |
153008 | https://en.wikipedia.org/wiki/Knot%20theory | Knot theory | In topology, knot theory is the study of mathematical knots. While inspired by knots which appear in daily life, such as those in shoelaces and rope, a mathematical knot differs in that the ends are joined so it cannot be undone, the simplest knot being a ring (or "unknot"). In mathematical language, a knot is an embed... | Mathematics | Geometry | null |
153221 | https://en.wikipedia.org/wiki/Heat%20exchanger | Heat exchanger | A heat exchanger is a system used to transfer heat between a source and a working fluid. Heat exchangers are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning,... | Technology | Heating and cooling | null |
153299 | https://en.wikipedia.org/wiki/Root-finding%20algorithm | Root-finding algorithm | In numerical analysis, a root-finding algorithm is an algorithm for finding zeros, also called "roots", of continuous functions. A zero of a function is a number such that . As, generally, the zeros of a function cannot be computed exactly nor expressed in closed form, root-finding algorithms provide approximations t... | Mathematics | Real analysis | null |
153353 | https://en.wikipedia.org/wiki/Andromeda%20%28constellation%29 | Andromeda (constellation) | Andromeda is one of the 48 constellations listed by the 2nd-century Greco-Roman astronomer Ptolemy, and one of the 88 modern constellations. Located in the northern celestial hemisphere, it is named for Andromeda, daughter of Cassiopeia, in the Greek myth, who was chained to a rock to be eaten by the sea monster Cetus... | Physical sciences | Other | Astronomy |
153520 | https://en.wikipedia.org/wiki/Fish%20farming | Fish farming | Fish farming or pisciculture involves commercial breeding of fish, most often for food, in fish tanks or artificial enclosures such as fish ponds. It is a particular type of aquaculture, which is the controlled cultivation and harvesting of aquatic animals such as fish, crustaceans, molluscs and so on, in natural or ps... | Technology | Aquaculture | null |
153522 | https://en.wikipedia.org/wiki/Plastid | Plastid | A plastid is a membrane-bound organelle found in the cells of plants, algae, and some other eukaryotic organisms. Plastids are considered to be intracellular endosymbiotic cyanobacteria.
Examples of plastids include chloroplasts (used for photosynthesis); chromoplasts (used for synthesis and storage of pigments); leuc... | Biology and health sciences | Plant cells | null |
153663 | https://en.wikipedia.org/wiki/Cytokine | Cytokine | Cytokines () are a broad and loose category of small proteins (~5–25 kDa) important in cell signaling. Due to their size, cytokines cannot cross the lipid bilayer of cells to enter the cytoplasm and therefore typically exert their functions by interacting with specific cytokine receptors on the target cell surface. Cyt... | Biology and health sciences | Cell processes | Biology |
153681 | https://en.wikipedia.org/wiki/Celestial%20equator | Celestial equator | The celestial equator is the great circle of the imaginary celestial sphere on the same plane as the equator of Earth. By extension, it is also a plane of reference in the equatorial coordinate system. In other words, the celestial equator is an abstract projection of the terrestrial equator into outer space. Due to Ea... | Physical sciences | Celestial sphere: General | Astronomy |
153761 | https://en.wikipedia.org/wiki/Humber%20Bridge | Humber Bridge | The Humber Bridge is a single-span road suspension bridge near Kingston upon Hull, East Riding of Yorkshire, England. When it opened to traffic on 24 June 1981, it was the longest of its type in the world; the Akashi Kaikyō Bridge surpassed it in 1998, and it became the thirteenth-longest by 2024.
The bridge spans th... | Technology | Bridges | null |
153783 | https://en.wikipedia.org/wiki/Crystal%20optics | Crystal optics | Crystal optics is the branch of optics that describes the behaviour of light in anisotropic media, that is, media (such as crystals) in which light behaves differently depending on which direction the light is propagating. The index of refraction depends on both composition and crystal structure and can be calculated u... | Physical sciences | Crystallography | Physics |
153784 | https://en.wikipedia.org/wiki/Naginata | Naginata | The naginata (, ) is a polearm and one of several varieties of traditionally made Japanese blades (nihontō). Naginata were originally used by the samurai class of feudal Japan, as well as by ashigaru (foot soldiers) and sōhei (warrior monks). The naginata is the iconic weapon of the onna-musha, a type of female warrior... | Technology | Polearms | null |
153797 | https://en.wikipedia.org/wiki/Orion%20%28constellation%29 | Orion (constellation) | Orion is a prominent set of stars visible during winter in the northern celestial hemisphere. It is one of the 88 modern constellations; it was among the 48 constellations listed by the 2nd-century astronomer Ptolemy. It is named after a hunter in Greek mythology.
Orion is most prominent during winter evenings in the ... | Physical sciences | Constellations | null |
153859 | https://en.wikipedia.org/wiki/Palisade | Palisade | A palisade, sometimes called a stakewall or a paling, is typically a row of closely placed, high vertical standing tree trunks or wooden or iron stakes used as a fence for enclosure or as a defensive wall. Palisades can form a stockade.
Etymology
Palisade derives from pale, from the Latin word , meaning stake, specif... | Technology | Fortification | null |
153861 | https://en.wikipedia.org/wiki/Moat | Moat | A moat is a deep, broad ditch dug around a castle, fortification, building, or town, historically to provide it with a preliminary line of defence. Moats can be dry or filled with water. In some places, moats evolved into more extensive water defences, including natural or artificial lakes, dams and sluices. In older f... | Technology | Fortification | null |
153882 | https://en.wikipedia.org/wiki/Spandex | Spandex | Spandex, Lycra, or elastane is a synthetic fiber known for its exceptional elasticity. It is a polyether-polyurea copolymer that was invented in 1958 by chemist Joseph Shivers at DuPont.
Name
The name spandex, which is an anagram of the word "expands", is the preferred name in North America. In continental Europe, it ... | Technology | Fabrics and fibers | null |
153911 | https://en.wikipedia.org/wiki/Invisibility | Invisibility | Invisibility is the state of an object that cannot be seen. An object in this state is said to be invisible (literally, "not visible"). The phenomenon is studied by physics and perceptual psychology.
Since objects can be seen by light from a source reflecting off their surfaces and hitting the viewer's eyes, the most... | Physical sciences | Optics | Physics |
11688148 | https://en.wikipedia.org/wiki/Chlamydia%20%28genus%29 | Chlamydia (genus) | Chlamydia is a genus of pathogenic Gram-negative bacteria that are obligate intracellular parasites. Chlamydia infections are the most common bacterial sexually transmitted diseases in humans and are the leading cause of infectious blindness worldwide.
Species include Chlamydia trachomatis (a human pathogen), Ch. suis... | Biology and health sciences | Gram-negative bacteria | Plants |
2142673 | https://en.wikipedia.org/wiki/Indigofera | Indigofera | Indigofera is a large genus of over 750 species of flowering plants belonging to the pea family Fabaceae. They are widely distributed throughout the tropical and subtropical regions of the world.
Description
Indigofera is a varied genus that has shown unique characteristics making it an interesting candidate as a pot... | Biology and health sciences | Fabales | Plants |
2143933 | https://en.wikipedia.org/wiki/Rhinorrhea | Rhinorrhea | Rhinorrhea (American English), also spelled rhinorrhoea or rhinorrhœa (British English), or informally runny nose is the free discharge of a thin mucus fluid from the nose; it is a common condition. It is a common symptom of allergies (hay fever) or certain viral infections, such as the common cold or COVID-19. It can ... | Biology and health sciences | Symptoms and signs | Health |
2144540 | https://en.wikipedia.org/wiki/Toxaphene | Toxaphene | Toxaphene was an insecticide used primarily for cotton in the southern United States during the late 1960s and the 1970s. Toxaphene is a mixture of over 670 different chemicals and is produced by reacting chlorine gas with camphene. It can be most commonly found as a yellow to amber waxy solid.
Toxaphene was banned in... | Technology | Pest and disease control | null |
15865266 | https://en.wikipedia.org/wiki/Waru%20Waru | Waru Waru | Waru Waru is an Aymara term for the agricultural technique developed by pre-Hispanic people in the Andes region of South America from Ecuador to Bolivia; this regional agricultural technique is also referred to as camellones in Spanish. Functionally similar agricultural techniques have been developed in other parts of ... | Technology | Buildings and infrastructure | null |
15868921 | https://en.wikipedia.org/wiki/Amp%C3%A8re%27s%20force%20law | Ampère's force law | In magnetostatics, the force of attraction or repulsion between two current-carrying wires (see first figure below) is often called Ampère's force law. The physical origin of this force is that each wire generates a magnetic field, following the Biot–Savart law, and the other wire experiences a magnetic force as a cons... | Physical sciences | Magnetostatics | Physics |
9205088 | https://en.wikipedia.org/wiki/Pelagornithidae | Pelagornithidae | The Pelagornithidae, commonly called pelagornithids, pseudodontorns, bony-toothed birds, false-toothed birds or pseudotooth birds, are a prehistoric family of large seabirds. Their fossil remains have been found all over the world in rocks dating between the Early Paleocene and the Pliocene-Pleistocene boundary.
Most ... | Biology and health sciences | Prehistoric birds | Animals |
7082456 | https://en.wikipedia.org/wiki/Astronomical%20Almanac | Astronomical Almanac | The Astronomical Almanac is an almanac published by the United Kingdom Hydrographic Office; it also includes data supplied by many scientists from around the world. On page vii, the listed major contributors to its various Sections are: H.M Nautical Almanac Office, United Kingdom Hydrographic Office; the Nautical Alman... | Technology | Astronomical technology | null |
7086534 | https://en.wikipedia.org/wiki/Kelvin%27s%20circulation%20theorem | Kelvin's circulation theorem | In fluid mechanics, Kelvin's circulation theorem states:In a barotropic, ideal fluid with conservative body forces, the circulation around a closed curve (which encloses the same fluid elements) moving with the fluid remains constant with time.
The theorem is named after William Thomson, 1st Baron Kelvin who published... | Physical sciences | Fluid mechanics | Physics |
2953081 | https://en.wikipedia.org/wiki/Limousin%20cattle | Limousin cattle | The Limousin, , is a French breed of beef cattle from the Limousin and Marche regions of France. It was formerly used mainly as a draught animal, but in modern times is reared for beef. A herd-book was established in France in 1886. With the mechanisation of agriculture in the twentieth century, numbers declined. In th... | Biology and health sciences | Cattle | Animals |
2953473 | https://en.wikipedia.org/wiki/Food%20group | Food group | Food groups categorise foods for educational purposes, usually grouping together foods with similar nutritional properties or biological classifications. Food groups are often used in nutrition guides, although the number of groups used can vary widely.
Food groups were a public health education concept invented to te... | Biology and health sciences | Health and fitness | null |
2955396 | https://en.wikipedia.org/wiki/Ethylenediamine | Ethylenediamine | Ethylenediamine (abbreviated as en when a ligand) is the organic compound with the formula C2H4(NH2)2. This colorless liquid with an ammonia-like odor is a basic amine. It is a widely used building block in chemical synthesis, with approximately 500,000 tonnes produced in 1998. Ethylenediamine is the first member of th... | Physical sciences | Amides and amines | Chemistry |
2955810 | https://en.wikipedia.org/wiki/Glomeromycota | Glomeromycota | Glomeromycota (often referred to as glomeromycetes, as they include only one class, Glomeromycetes) are one of eight currently recognized divisions within the kingdom Fungi, with approximately 230 described species. Members of the Glomeromycota form arbuscular mycorrhizas (AMs) with the thalli of bryophytes and the roo... | Biology and health sciences | Basics | Plants |
2956372 | https://en.wikipedia.org/wiki/Foot%20per%20second | Foot per second | The foot per second (plural feet per second) is a unit of both speed (scalar) and velocity (vector quantity, which includes direction). It expresses the distance in feet (ft) traveled or displaced, divided by the time in seconds (s). The corresponding unit in the International System of Units (SI) is the meter per seco... | Physical sciences | Speed | Basics and measurement |
4061767 | https://en.wikipedia.org/wiki/Heaviside%E2%80%93Lorentz%20units | Heaviside–Lorentz units | Heaviside–Lorentz units (or Lorentz–Heaviside units) constitute a system of units and quantities that extends the CGS with a particular set of equations that defines electromagnetic quantities, named for Oliver Heaviside and Hendrik Antoon Lorentz. They share with the CGS-Gaussian system that the electric constant and... | Physical sciences | Measurement systems | Basics and measurement |
4063480 | https://en.wikipedia.org/wiki/Mudskipper | Mudskipper | Mudskippers are any of the 23 extant species of amphibious fish from the subfamily Oxudercinae of the goby family Oxudercidae. They are known for their unusual body shapes, preferences for semiaquatic habitats, limited terrestrial locomotion and jumping, and the ability to survive prolonged periods of time both in and ... | Biology and health sciences | Acanthomorpha | Animals |
4064886 | https://en.wikipedia.org/wiki/Hyneria | Hyneria | Hyneria is a genus of large prehistoric predatory lobe-finned fish which lived in fresh water during the Famennian stage of the Devonian period.
Etymology
The genus name Hyneria is a reference to the village of Hyner, Pennsylvania, near where the first specimen was found. The species epithet H. lindae is derived from ... | Biology and health sciences | Prehistoric osteichthyans | Animals |
4068447 | https://en.wikipedia.org/wiki/Successive%20over-relaxation | Successive over-relaxation | In numerical linear algebra, the method of successive over-relaxation (SOR) is a variant of the Gauss–Seidel method for solving a linear system of equations, resulting in faster convergence. A similar method can be used for any slowly converging iterative process.
It was devised simultaneously by David M. Young Jr. an... | Mathematics | Linear algebra | null |
5417918 | https://en.wikipedia.org/wiki/Basement%20%28geology%29 | Basement (geology) | In geology, basement and crystalline basement are crystalline rocks lying above the mantle and beneath all other rocks and sediments. They are sometimes exposed at the surface, but often they are buried under miles of rock and sediment. The basement rocks lie below a sedimentary platform or cover, or more generally any... | Physical sciences | Stratigraphy | Earth science |
963313 | https://en.wikipedia.org/wiki/Hemp | Hemp | Hemp, or industrial hemp, is a plant in the botanical class of Cannabis sativa cultivars grown specifically for industrial and consumable use. It can be used to make a wide range of products. Along with bamboo, hemp is among the fastest growing plants on Earth. It was also one of the first plants to be spun into usable... | Biology and health sciences | Rosales | Plants |
963403 | https://en.wikipedia.org/wiki/Messier%2049 | Messier 49 | Messier 49 (also known as M49 or NGC 4472) is a giant elliptical galaxy about away in the equatorial constellation of Virgo. This galaxy was discovered by astronomer Charles Messier in 1777.
As an elliptical galaxy, Messier 49 has the physical form of a radio galaxy, but it only has the radio emission of a normal gal... | Physical sciences | Notable galaxies | Astronomy |
963967 | https://en.wikipedia.org/wiki/Fireplace | Fireplace | A fireplace or hearth is a structure made of brick, stone or metal designed to contain a fire. Fireplaces are used for the relaxing ambiance they create and for heating a room. Modern fireplaces vary in heat efficiency, depending on the design.
Historically, they were used for heating a dwelling, cooking, and heating ... | Technology | Other components | null |
964428 | https://en.wikipedia.org/wiki/Weighing%20scale | Weighing scale | A scale or balance is a device used to measure weight or mass. These are also known as mass scales, weight scales, mass balances, massometers, and weight balances.
The traditional scale consists of two plates or bowls suspended at equal distances from a fulcrum. One plate holds an object of unknown mass (or weight), w... | Physical sciences | Classical mechanics | null |
964475 | https://en.wikipedia.org/wiki/Dwarf%20galaxy | Dwarf galaxy | A dwarf galaxy is a small galaxy composed of about 1000 up to several billion stars, as compared to the Milky Way's 200–400 billion stars. The Large Magellanic Cloud, which closely orbits the Milky Way and contains over 30 billion stars, is sometimes classified as a dwarf galaxy; others consider it a full-fledged galax... | Physical sciences | Galaxy morphological classification | null |
965247 | https://en.wikipedia.org/wiki/Spanish%20dancer | Spanish dancer | The Spanish dancer, scientific name Hexabranchus sanguineus (literally meaning "blood-colored six-gills"), is a dorid nudibranch, a very large and colorful sea slug, a marine gastropod mollusk in the family Hexabranchidae.The taxonomy of the genus Hexabranchus has been controversial but a thorough molecular and morphol... | Biology and health sciences | Gastropods | Animals |
965323 | https://en.wikipedia.org/wiki/Antimicrobial | Antimicrobial | An antimicrobial is an agent that kills microorganisms (microbicide) or stops their growth (bacteriostatic agent). Antimicrobial medicines can be grouped according to the microorganisms they act primarily against. For example, antibiotics are used against bacteria, and antifungals are used against fungi. They can also ... | Biology and health sciences | Anti-infectives | Health |
965924 | https://en.wikipedia.org/wiki/Roller%20%28agricultural%20tool%29 | Roller (agricultural tool) | The roller is an agricultural tool used for flattening land or breaking up large clumps of soil, especially after ploughing or disc harrowing. Typically, rollers are pulled by tractors or, prior to mechanisation, a team of animals such as horses or oxen. As well as for agricultural purposes, rollers are used on cricket... | Technology | Agricultural tools | null |
11694119 | https://en.wikipedia.org/wiki/Inverse%20second | Inverse second | The inverse second or reciprocal second (s−1), also called per second, is a unit defined as the multiplicative inverse of the second (a unit of time). It is applicable for physical quantities of dimension reciprocal time, such as frequency and strain rate.
It is dimensionally equivalent to:
hertz (Hz), historically k... | Physical sciences | Angular velocity | Basics and measurement |
562526 | https://en.wikipedia.org/wiki/Sugar%20alcohol | Sugar alcohol | Sugar alcohols (also called polyhydric alcohols, polyalcohols, alditols or glycitols) are organic compounds, typically derived from sugars, containing one hydroxyl group attached to each carbon atom. They are white, water-soluble solids that can occur naturally or be produced industrially by hydrogenating sugars. Sinc... | Physical sciences | Sugar alcohols | Chemistry |
562782 | https://en.wikipedia.org/wiki/Vertex%20cover | Vertex cover | In graph theory, a vertex cover (sometimes node cover) of a graph is a set of vertices that includes at least one endpoint of every edge of the graph.
In computer science, the problem of finding a minimum vertex cover is a classical optimization problem. It is NP-hard, so it cannot be solved by a polynomial-time alg... | Mathematics | Graph theory | null |
562883 | https://en.wikipedia.org/wiki/Higher-order%20logic | Higher-order logic | In mathematics and logic, a higher-order logic (abbreviated HOL) is a form of logic that is distinguished from first-order logic by additional quantifiers and, sometimes, stronger semantics. Higher-order logics with their standard semantics are more expressive, but their model-theoretic properties are less well-behaved... | Mathematics | Mathematical logic | null |
562958 | https://en.wikipedia.org/wiki/Signs%20and%20symptoms | Signs and symptoms | Signs and symptoms are diagnostic indications of an illness, injury, or condition.
Signs are objective and externally observable; symptoms are a person's reported subjective experiences.
A sign for example may be a higher or lower temperature than normal, raised or lowered blood pressure or an abnormality showing on ... | Biology and health sciences | Symptoms and signs | Health |
563137 | https://en.wikipedia.org/wiki/Sun%20bear | Sun bear | The sun bear (Helarctos malayanus) is a bear species in the family Ursidae found in the tropical forests of Southeast Asia. It is the only species in the genus Helarctos and the smallest bear species, standing nearly at the shoulder and weighing . It is stockily built, with large paws, strongly curved claws, small, ro... | Biology and health sciences | Bears | Animals |
563161 | https://en.wikipedia.org/wiki/Membrane%20potential | Membrane potential | Membrane potential (also transmembrane potential or membrane voltage) is the difference in electric potential between the interior and the exterior of a biological cell. It equals the interior potential minus the exterior potential. This is the energy (i.e. work) per charge which is required to move a (very small) posi... | Biology and health sciences | Cell parts | Biology |
563290 | https://en.wikipedia.org/wiki/Adansonia | Adansonia | Adansonia is a genus made up of eight species of medium-to-large deciduous trees known as baobabs ( or ) or adansonias. They are placed in the family Malvaceae, subfamily Bombacoideae. They are native to Madagascar, mainland Africa, and Australia. The trees have also been introduced to other regions such as Asia. A ge... | Biology and health sciences | Others | null |
564276 | https://en.wikipedia.org/wiki/Delimiter | Delimiter | A delimiter is a sequence of one or more characters for specifying the boundary between separate, independent regions in plain text, mathematical expressions or other data streams. An example of a delimiter is the comma character, which acts as a field delimiter in a sequence of comma-separated values. Another example ... | Technology | Programming languages | null |
564380 | https://en.wikipedia.org/wiki/Expression%20vector | Expression vector | An expression vector, otherwise known as an expression construct, is usually a plasmid or virus designed for gene expression in cells. The vector is used to introduce a specific gene into a target cell, and can commandeer the cell's mechanism for protein synthesis to produce the protein encoded by the gene. Expression... | Biology and health sciences | Molecular biology | Biology |
564384 | https://en.wikipedia.org/wiki/Clock%20face | Clock face | A clock face is the part of an analog clock (or watch) that displays time through the use of a flat dial with reference marks, and revolving pointers turning on concentric shafts at the center, called hands. In its most basic, globally recognized form, the periphery of the dial is numbered 1 through 12 indicating the ... | Technology | Clocks | null |
564971 | https://en.wikipedia.org/wiki/African%20buffalo | African buffalo | The African buffalo (Syncerus caffer) is a large sub-Saharan African bovine. There are five subspecies that are recognized as valid by most authorities:
Syncerus caffer caffer, the Cape buffalo, is the nominotypical subspecies, as well as the largest, found in Southern and East Africa.
S. c. nanus, the forest buffal... | Biology and health sciences | Artiodactyla | null |
565530 | https://en.wikipedia.org/wiki/Mesopelagic%20zone | Mesopelagic zone | The mesopelagic zone (Greek μέσον, middle), also known as the middle pelagic or twilight zone, is the part of the pelagic zone that lies between the photic epipelagic and the aphotic bathypelagic zones. It is defined by light, and begins at the depth where only 1% of incident light reaches and ends where there is no li... | Physical sciences | Oceanography | Earth science |
565536 | https://en.wikipedia.org/wiki/Bathypelagic%20zone | Bathypelagic zone | The bathypelagic zone or bathyal zone (from Greek βαθύς (bathýs), deep) is the part of the open ocean that extends from a depth of below the ocean surface. It lies between the mesopelagic above and the abyssopelagic below. The bathypelagic is also known as the midnight zone because of the lack of sunlight; this featur... | Physical sciences | Oceanography | Earth science |
566041 | https://en.wikipedia.org/wiki/Centaurea%20cyanus | Centaurea cyanus | Centaurea cyanus, commonly known as cornflower or bachelor's button, is an annual flowering plant in the family Asteraceae native to Europe. In the past, it often grew as a weed in cornfields (in the broad sense of "corn", referring to grains, such as wheat, barley, rye, or oats), hence its name. It is now endangered i... | Biology and health sciences | Asterales | Plants |
14355756 | https://en.wikipedia.org/wiki/Metal%E2%80%93semiconductor%20junction | Metal–semiconductor junction | In solid-state physics, a metal–semiconductor (M–S) junction is a type of electrical junction in which a metal comes in close contact with a semiconductor material. It is the oldest type of practical semiconductor device. M–S junctions can either be rectifying or non-rectifying. The rectifying metal–semiconductor ju... | Physical sciences | Electrical circuits | Physics |
13201685 | https://en.wikipedia.org/wiki/Smart%20grid | Smart grid | The smart grid is an enhancement of the 20th century electrical grid, using two-way communications and distributed so-called intelligent devices. Two-way flows of electricity and information could improve the delivery network. Research is mainly focused on three systems of a smart grid – the infrastructure system, the ... | Technology | Electricity transmission and distribution | null |
9214162 | https://en.wikipedia.org/wiki/Turritopsis%20dohrnii | Turritopsis dohrnii | Turritopsis dohrnii, also known as the immortal jellyfish, is a species of small, biologically immortal jellyfish found worldwide in temperate to tropic waters. It is one of the few known cases of animals capable of reverting completely to a sexually immature, colonial stage after having reached sexual maturity as a so... | Biology and health sciences | Cnidarians | Animals |
9217017 | https://en.wikipedia.org/wiki/Transition%20state%20theory | Transition state theory | In chemistry, transition state theory (TST) explains the reaction rates of elementary chemical reactions. The theory assumes a special type of chemical equilibrium (quasi-equilibrium) between reactants and activated transition state complexes.
TST is used primarily to understand qualitatively how chemical reactions ta... | Physical sciences | Kinetics | Chemistry |
9221221 | https://en.wikipedia.org/wiki/Ceramic%20capacitor | Ceramic capacitor | A ceramic capacitor is a fixed-value capacitor where the ceramic material acts as the dielectric. It is constructed of two or more alternating layers of ceramic and a metal layer acting as the electrodes. The composition of the ceramic material defines the electrical behavior and therefore applications. Ceramic capacit... | Technology | Components | null |
6935153 | https://en.wikipedia.org/wiki/Cuvier%27s%20dwarf%20caiman | Cuvier's dwarf caiman | Cuvier's dwarf caiman (Paleosuchus palpebrosus) is a small crocodilian in the alligator family from northern and central South America. It is found in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname, Trinidad and Venezuela. It lives in riverine forests, flooded forests near lakes, an... | Biology and health sciences | Crocodilia | Animals |
10725984 | https://en.wikipedia.org/wiki/Gunshot%20wound | Gunshot wound | A gunshot wound (GSW) is a penetrating injury caused by a projectile (e.g. a bullet) shot from a gun (typically a firearm). Damage may include bleeding, bone fractures, organ damage, wound infection, and loss of the ability to move part of the body. Damage depends on the part of the body hit, the path the bullet follow... | Biology and health sciences | Types | Health |
10727548 | https://en.wikipedia.org/wiki/Evolution%20of%20mammals | Evolution of mammals | The evolution of mammals has passed through many stages since the first appearance of their synapsid ancestors in the Pennsylvanian sub-period of the late Carboniferous period. By the mid-Triassic, there were many synapsid species that looked like mammals. The lineage leading to today's mammals split up in the Jurassic... | Biology and health sciences | Basics_4 | Biology |
7096085 | https://en.wikipedia.org/wiki/Construction%20aggregate | Construction aggregate | Construction aggregate, or simply aggregate, is a broad category of coarse- to medium-grained particulate material used in construction. Traditionally, it includes natural materials such as sand, gravel, crushed stone. As with other types of aggregates, it is a component of composite materials, particularly concrete an... | Technology | Building materials | null |
1495085 | https://en.wikipedia.org/wiki/Archaeopteris | Archaeopteris | Archaeopteris is an extinct genus of progymnosperm tree with fern-like leaves. A useful index fossil, this tree is found in strata dating from the Upper Devonian to Lower Carboniferous (), the oldest fossils being 385 million years old, and had global distribution.
Until the 2007 discovery of Wattieza, many scientist... | Biology and health sciences | Pteridophytes | Plants |
1495421 | https://en.wikipedia.org/wiki/Li%20%28unit%29 | Li (unit) | Li or ri (, lǐ, or , shìlǐ), also known as the Chinese mile, is a traditional Chinese unit of distance. The li has varied considerably over time but was usually about one third of an English mile and now has a standardized length of a half-kilometer (). This is then divided into 1,500 chi or "Chinese feet".
The charac... | Physical sciences | East Asian | Basics and measurement |
1495725 | https://en.wikipedia.org/wiki/Picea%20rubens | Picea rubens | Picea rubens, commonly known as red spruce, is a species of spruce native to eastern North America, ranging from eastern Quebec and Nova Scotia, west to the Adirondack Mountains and south through New England along the Appalachians to western North Carolina and eastern Tennessee. This species is also known as yellow spr... | Biology and health sciences | Pinaceae | Plants |
1499520 | https://en.wikipedia.org/wiki/Funnel%20cloud | Funnel cloud | A funnel cloud is a funnel-shaped cloud of condensed water droplets, associated with a rotating column of wind and extending from the base of a cloud (usually a cumulonimbus or towering cumulus cloud) but not reaching the ground or a water surface. A funnel cloud is usually visible as a cone-shaped or needle like protu... | Physical sciences | Clouds | Earth science |
2145666 | https://en.wikipedia.org/wiki/Toxodon | Toxodon | Toxodon (meaning "bow tooth" in reference to the curvature of the teeth) is an extinct genus of large ungulate native to South America from the Pliocene to the end of the Late Pleistocene. Toxodon is a member of Notoungulata, an order of extinct South American native ungulates distinct from the two living ungulate orde... | Biology and health sciences | Mammals: General | Animals |
2146034 | https://en.wikipedia.org/wiki/CRISPR | CRISPR | CRISPR () (an acronym for clustered regularly interspaced short palindromic repeats) is a family of DNA sequences found in the genomes of prokaryotic organisms such as bacteria and archaea. Each sequence within an individual prokaryotic cell is derived from a DNA fragment of a bacteriophage that had previously infected... | Technology | Biotechnology | null |
2146163 | https://en.wikipedia.org/wiki/SN%201572 | SN 1572 | SN 1572 (Tycho's Star, Tycho's Nova, Tycho's Supernova), or B Cassiopeiae (B Cas), was a supernova of Type Ia in the constellation Cassiopeia, one of eight supernovae visible to the naked eye in historical records. It appeared in early November 1572 and was independently discovered by many individuals.
Its supernova r... | Physical sciences | Notable transient events | Astronomy |
2149536 | https://en.wikipedia.org/wiki/Reptiliomorpha | Reptiliomorpha | Reptiliomorpha (meaning reptile-shaped; in PhyloCode known as Pan-Amniota) is a clade containing the amniotes and those tetrapods that share a more recent common ancestor with amniotes than with living amphibians (lissamphibians). It was defined by Michel Laurin (2001) and Vallin and Laurin (2004) as the largest clade ... | Biology and health sciences | Reptiliomorphs | Animals |
2150441 | https://en.wikipedia.org/wiki/Quantifier%20elimination | Quantifier elimination | Quantifier elimination is a concept of simplification used in mathematical logic, model theory, and theoretical computer science. Informally, a quantified statement " such that " can be viewed as a question "When is there an such that ?", and the statement without quantifiers can be viewed as the answer to that questi... | Mathematics | Model theory | null |
2150513 | https://en.wikipedia.org/wiki/Green%20sea%20turtle | Green sea turtle | The green sea turtle (Chelonia mydas), also known as the green turtle, black (sea) turtle or Pacific green turtle, is a species of large sea turtle of the family Cheloniidae. It is the only species in the genus Chelonia. Its range extends throughout tropical and subtropical seas around the world, with two distinct popu... | Biology and health sciences | Turtles | Animals |
5431281 | https://en.wikipedia.org/wiki/Circumferentor | Circumferentor | A circumferentor, or surveyor's compass, is an instrument used in surveying to measure horizontal angles. It was superseded by the theodolite in the early 19th century.
A circumferentor consists of a circular brass box containing a magnetic needle, which moves freely over a brass circle, or compass divided into 360 d... | Technology | Surveying tools | null |
2958015 | https://en.wikipedia.org/wiki/Philosophy%20of%20artificial%20intelligence | Philosophy of artificial intelligence | The philosophy of artificial intelligence is a branch of the philosophy of mind and the philosophy of computer science that explores artificial intelligence and its implications for knowledge and understanding of intelligence, ethics, consciousness, epistemology, and free will. Furthermore, the technology is concerned ... | Technology | Artificial intelligence concepts | null |
2959226 | https://en.wikipedia.org/wiki/Acacia | Acacia | Acacia, commonly known as wattles or acacias, is a genus of about of shrubs and trees in the subfamily Mimosoideae of the pea family Fabaceae. Initially, it comprised a group of plant species native to Africa, South America, and Australasia, but is now reserved for species mainly from Australia, with others from New G... | Biology and health sciences | Fabales | Plants |
2959657 | https://en.wikipedia.org/wiki/Epidermis%20%28botany%29 | Epidermis (botany) | The epidermis (from the Greek ἐπιδερμίς, meaning "over-skin") is a single layer of cells that covers the leaves, flowers, roots and stems of plants. It forms a boundary between the plant and the external environment. The epidermis serves several functions: it protects against water loss, regulates gas exchange, secrete... | Biology and health sciences | Plant tissues | null |
314402 | https://en.wikipedia.org/wiki/Liquid%20oxygen | Liquid oxygen | Liquid oxygen, sometimes abbreviated as LOX or LOXygen, is a clear cyan liquid form of dioxygen . It was used as the oxidizer in the first liquid-fueled rocket invented in 1926 by Robert H. Goddard, an application which is ongoing.
Physical properties
Liquid oxygen has a clear cyan color and is strongly paramagnetic: ... | Physical sciences | Group 16 | Chemistry |
314494 | https://en.wikipedia.org/wiki/Libration | Libration | In lunar astronomy, libration is the cyclic variation in the apparent position of the Moon that is perceived by observers on the Earth observers and caused by changes between the orbital and rotational planes of the moon. It causes an observer to see slightly different hemispheres of the surface at different times. It ... | Physical sciences | Celestial mechanics | Astronomy |
314510 | https://en.wikipedia.org/wiki/Dire%20wolf | Dire wolf | The dire wolf (Aenocyon dirus ) is an extinct canine. The dire wolf lived in the Americas during the Late Pleistocene and Early Holocene epochs (125,000–9,500 years ago). A putative, controversial fossil was recently reported from northeast China, but other researchers questioned the taxonomic attribution of this speci... | Biology and health sciences | Canines | Animals |
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