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 |
|---|---|---|---|---|---|---|
366810 | https://en.wikipedia.org/wiki/Knot%20%28unit%29 | Knot (unit) | The knot () is a unit of speed equal to one nautical mile per hour, exactly (approximately or ). The ISO standard symbol for the knot is kn. The same symbol is preferred by the Institute of Electrical and Electronics Engineers (IEEE), while kt is also common, especially in aviation, where it is the form recommended b... | Physical sciences | Velocity | null |
367399 | https://en.wikipedia.org/wiki/Safrole | Safrole | Safrole is an organic compound with the formula CH2O2C6H3CH2CH=CH2. It is a colorless oily liquid, although impure samples can appear yellow. A member of the phenylpropanoid family of natural products, it is found in sassafras plants, among others. Small amounts are found in a wide variety of plants, where it functi... | Physical sciences | Phenylpropanoids | Chemistry |
367461 | https://en.wikipedia.org/wiki/Pholcidae | Pholcidae | The Pholcidae are a family of araneomorph spiders. The family contains more than 1,800 individual species of pholcids, including those commonly known as cellar spider, daddy long-legs spider, carpenter spider, daddy long-legger, vibrating spider, gyrating spider, long daddy, and angel spider. The family, first describe... | Biology and health sciences | Spiders | Animals |
367492 | https://en.wikipedia.org/wiki/Trace%20fossil | Trace fossil | A trace fossil, also known as an ichnofossil (; from ikhnos "trace, track"), is a fossil record of biological activity by lifeforms but not the preserved remains of the organism itself. Trace fossils contrast with body fossils, which are the fossilized remains of parts of organisms' bodies, usually altered by later ch... | Biology and health sciences | Paleontology | Biology |
367503 | https://en.wikipedia.org/wiki/Concretion | Concretion | A concretion is a hard and compact mass formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary rock or soil. Concretions are often ovoid or spherical in shape, although irregular shapes also occur. The word concretion is borrowed from Latin , itself derived from ... | Physical sciences | Sedimentary rocks | Earth science |
367867 | https://en.wikipedia.org/wiki/Citron | Citron | The citron (Citrus medica), historically cedrate, is a large fragrant citrus fruit with a thick rind. It is said to resemble a 'huge, rough lemon'. It is one of the original citrus fruits from which all other citrus types developed through natural hybrid speciation or artificial hybridization. Though citron cultivars t... | Biology and health sciences | Citrus fruits | Plants |
368227 | https://en.wikipedia.org/wiki/Epicyclic%20gearing | Epicyclic gearing | An epicyclic gear train (also known as a planetary gearset) is a gear reduction assembly consisting of two gears mounted so that the center of one gear (the "planet") revolves around the center of the other (the "sun"). A carrier connects the centers of the two gears and rotates, to carry the planet gear(s) around the ... | Technology | Mechanisms | null |
368328 | https://en.wikipedia.org/wiki/Electrostatics | Electrostatics | Electrostatics is a branch of physics that studies slow-moving or stationary electric charges.
Since classical times, it has been known that some materials, such as amber, attract lightweight particles after rubbing. The Greek word for amber, (), was thus the root of the word electricity. Electrostatic phenomena aris... | Physical sciences | Electrostatics | null |
368389 | https://en.wikipedia.org/wiki/Ultrafiltration | Ultrafiltration | Ultrafiltration (UF) is a variety of membrane filtration in which forces such as pressure or concentration gradients lead to a separation through a semipermeable membrane. Suspended solids and solutes of high molecular weight are retained in the so-called retentate, while water and low molecular weight solutes pass thr... | Physical sciences | Other separations | Chemistry |
368390 | https://en.wikipedia.org/wiki/Microfiltration | Microfiltration | Microfiltration is a type of physical filtration process where a contaminated fluid is passed through a special pore-sized membrane filter to separate microorganisms and suspended particles from process liquid. It is commonly used in conjunction with various other separation processes such as ultrafiltration and revers... | Physical sciences | Other separations | Chemistry |
368684 | https://en.wikipedia.org/wiki/Moment%20%28mathematics%29 | Moment (mathematics) | In mathematics, the moments of a function are certain quantitative measures related to the shape of the function's graph. If the function represents mass density, then the zeroth moment is the total mass, the first moment (normalized by total mass) is the center of mass, and the second moment is the moment of inertia. ... | Mathematics | Probability | null |
17684209 | https://en.wikipedia.org/wiki/Pleurosauridae | Pleurosauridae | Pleurosauridae is an extinct family of sphenodontian reptiles, known from the Jurassic of Europe. Members of the family had long-snake like bodies with reduced limbs that were adapted for aquatic life in marine environments. It contains two genera, Palaeopleurosaurus, which is known from the Early Jurassic (Toarcian) P... | Biology and health sciences | Rhynchocephalia | Animals |
184331 | https://en.wikipedia.org/wiki/Petalite | Petalite | Petalite, also known as castorite, is a lithium aluminum phyllosilicate mineral LiAlSi4O10, crystallizing in the monoclinic system. Petalite occurs as colorless, pink, grey, yellow, yellow grey, to white tabular crystals and columnar masses. It occurs in lithium-bearing pegmatites with spodumene, lepidolite, and tourma... | Physical sciences | Silicate minerals | Earth science |
184342 | https://en.wikipedia.org/wiki/Naphtha | Naphtha | Naphtha (, recorded as less common or nonstandard in all dictionaries: ) is a flammable liquid hydrocarbon mixture. Generally, it is a fraction of crude oil, but it can also be produced from natural-gas condensates, petroleum distillates, and the fractional distillation of coal tar and peat. In some industries and reg... | Physical sciences | Hydrocarbons | Chemistry |
184393 | https://en.wikipedia.org/wiki/Thrush%20%28bird%29 | Thrush (bird) | The thrushes are a passerine bird family, Turdidae, with a worldwide distribution. The family was once much larger before biologists reclassified the former subfamily Saxicolinae, which includes the chats and European robins, as Old World flycatchers. Thrushes are small to medium-sized ground living birds that feed on ... | Biology and health sciences | Passerida | null |
184414 | https://en.wikipedia.org/wiki/Spoonbill | Spoonbill | Spoonbills are a genus, Platalea, of large, long-legged wading birds. The spoonbills have a global distribution, being found on every continent except Antarctica. The genus name Platalea derives from Ancient Greek and means "broad", referring to the distinctive shape of the bill. Six species are recognised, which altho... | Biology and health sciences | Pelecanimorphae | Animals |
184527 | https://en.wikipedia.org/wiki/Uncrewed%20spacecraft | Uncrewed spacecraft | Uncrewed spacecraft or robotic spacecraft are spacecraft without people on board. Uncrewed spacecraft may have varying levels of autonomy from human input, such as remote control, or remote guidance. They may also be autonomous, in which they have a pre-programmed list of operations that will be executed unless otherwi... | Technology | Basics_6 | null |
184540 | https://en.wikipedia.org/wiki/GABA | GABA | GABA (gamma-aminobutyric acid, γ-aminobutyric acid) is the chief inhibitory neurotransmitter in the developmentally mature mammalian central nervous system. Its principal role is reducing neuronal excitability throughout the nervous system.
GABA is sold as a dietary supplement in many countries. It has been traditiona... | Biology and health sciences | Neurotransmitters | Biology |
184726 | https://en.wikipedia.org/wiki/Heat%20transfer | Heat transfer | Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy (heat) between physical systems. Heat transfer is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase chan... | Physical sciences | Thermodynamics | null |
184729 | https://en.wikipedia.org/wiki/Sanitation | Sanitation | Sanitation refers to public health conditions related to clean drinking water and treatment and disposal of human excreta and sewage. Preventing human contact with feces is part of sanitation, as is hand washing with soap. Sanitation systems aim to protect human health by providing a clean environment that will stop th... | Technology | Health, fitness, and medicine | null |
184774 | https://en.wikipedia.org/wiki/Amanita%20phalloides | Amanita phalloides | Amanita phalloides (), commonly known as the death cap, is a deadly poisonous basidiomycete fungus and mushroom, one of many in the genus Amanita. Originating in Europe but later introduced to other parts of the world since the late twentieth century, A. phalloides forms ectomycorrhizas with various broadleaved trees. ... | Biology and health sciences | Poisonous fungi | null |
184826 | https://en.wikipedia.org/wiki/Common%20blackbird | Common blackbird | The common blackbird (Turdus merula) is a species of true thrush. It is also called the Eurasian blackbird (especially in North America, to distinguish it from the unrelated New World blackbirds), or simply the blackbird where this does not lead to confusion with a local species. It breeds in Europe, western Asia, and... | Biology and health sciences | Passerida | Animals |
184842 | https://en.wikipedia.org/wiki/Triggerfish | Triggerfish | Triggerfish are about 40 species of often brightly colored marine ray-finned fishes belonging to the family Balistidae. Often marked by lines and spots, they inhabit tropical and subtropical oceans throughout the world, with the greatest species richness in the Indo-Pacific. Most are found in relatively shallow, coasta... | Biology and health sciences | Acanthomorpha | Animals |
184873 | https://en.wikipedia.org/wiki/Potassium%20ferricyanide | Potassium ferricyanide | Potassium ferricyanide is the chemical compound with the formula K3[Fe(CN)6]. This bright red salt contains the octahedrally coordinated [Fe(CN)6]3− ion. It is soluble in water and its solution shows some green-yellow fluorescence. It was discovered in 1822 by Leopold Gmelin.
Preparation
Potassium ferricyanide is manu... | Physical sciences | Cyanide salts | Chemistry |
184881 | https://en.wikipedia.org/wiki/Reducing%20agent | Reducing agent | In chemistry, a reducing agent (also known as a reductant, reducer, or electron donor) is a chemical species that "donates" an electron to an (called the , , , or ).
Examples of substances that are common reducing agents include hydrogen, carbon monoxide, the alkali metals, formic acid, oxalic acid, and sulfite compo... | Physical sciences | Redox reactions | Chemistry |
184882 | https://en.wikipedia.org/wiki/Oxidizing%20agent | Oxidizing agent | An oxidizing agent (also known as an oxidant, oxidizer, electron recipient, or electron acceptor) is a substance in a redox chemical reaction that gains or "accepts"/"receives" an electron from a (called the , , or electron donor). In other words, an oxidizer is any substance that oxidizes another substance. The oxida... | Physical sciences | Redox reactions | Chemistry |
184897 | https://en.wikipedia.org/wiki/Reagent | Reagent | In chemistry, a reagent ( ) or analytical reagent is a substance or compound added to a system to cause a chemical reaction, or test if one occurs. The terms reactant and reagent are often used interchangeably, but reactant specifies a substance consumed in the course of a chemical reaction. Solvents, though involved i... | Physical sciences | Reaction | Chemistry |
184898 | https://en.wikipedia.org/wiki/Ramsey%27s%20theorem | Ramsey's theorem | In combinatorics, Ramsey's theorem, in one of its graph-theoretic forms, states that one will find monochromatic cliques in any edge labelling (with colours) of a sufficiently large complete graph. To demonstrate the theorem for two colours (say, blue and red), let and be any two positive integers. Ramsey's theorem s... | Mathematics | Combinatorics | null |
184904 | https://en.wikipedia.org/wiki/Photonics | Photonics | Photonics is a branch of optics that involves the application of generation, detection, and manipulation of light in the form of photons through emission, transmission, modulation, signal processing, switching, amplification, and sensing.
Photonics is closely related to quantum electronics, where quantum electronics ... | Physical sciences | Optics | Physics |
185041 | https://en.wikipedia.org/wiki/MSN | MSN | MSN is a web portal and related collection of Internet services and apps provided by Microsoft. The main webpage provides news, weather, sports, finance and other content curated from hundreds of different sources that Microsoft has partnered with. MSN is based in the United States and offers international versions of ... | Technology | Portals/Platform sites | null |
185152 | https://en.wikipedia.org/wiki/Chat%20%28bird%29 | Chat (bird) | Chats (formerly sometimes known as "chat-thrushes") are a group of small Old World insectivorous birds formerly classified as members of the thrush family (Turdidae), but following genetic DNA analysis, are now considered to belong to the Old World flycatcher family (Muscicapidae).
The name is normally applied to the ... | Biology and health sciences | Passerida | Animals |
185153 | https://en.wikipedia.org/wiki/Isostasy | Isostasy | Isostasy (Greek ísos 'equal', stásis 'standstill') or isostatic equilibrium is the state of gravitational equilibrium between Earth's crust (or lithosphere) and mantle such that the crust "floats" at an elevation that depends on its thickness and density. This concept is invoked to explain how different topographic hei... | Physical sciences | Geophysics | Earth science |
185234 | https://en.wikipedia.org/wiki/Darter | Darter | The darters, anhingas, or snakebirds are mainly tropical waterbirds in the family Anhingidae, which contains a single genus, Anhinga. There are four living species, three of which are very common and widespread while the fourth is rarer and classified as near-threatened by the IUCN. The term snakebird is usually used w... | Biology and health sciences | Pelecanimorphae | null |
185239 | https://en.wikipedia.org/wiki/Thermal%20radiation | Thermal radiation | Thermal radiation is electromagnetic radiation emitted by the thermal motion of particles in matter. All matter with a temperature greater than absolute zero emits thermal radiation. The emission of energy arises from a combination of electronic, molecular, and lattice oscillations in a material. Kinetic energy is conv... | Physical sciences | Thermodynamics | Physics |
185259 | https://en.wikipedia.org/wiki/Germ%20theory%20of%20disease | Germ theory of disease | The germ theory of disease is the currently accepted scientific theory for many diseases. It states that microorganisms known as pathogens or "germs" can cause disease. These small organisms, which are too small to be seen without magnification, invade humans, other animals, and other living hosts. Their growth and rep... | Biology and health sciences | Concepts | Health |
185266 | https://en.wikipedia.org/wiki/Fluphenazine | Fluphenazine | Fluphenazine, sold under the brand name Prolixin among others, is a high-potency typical antipsychotic medication. It is used in the treatment of chronic psychoses such as schizophrenia, and appears to be about equal in effectiveness to low-potency antipsychotics like chlorpromazine. It is given by mouth, injection int... | Biology and health sciences | Psychiatric drugs | Health |
185324 | https://en.wikipedia.org/wiki/Musket | Musket | A musket is a muzzle-loaded long gun that appeared as a smoothbore weapon in the early 16th century, at first as a heavier variant of the arquebus, capable of penetrating plate armour. By the mid-16th century, this type of musket gradually disappeared as the use of heavy armour declined, but musket continued as the gen... | Technology | Projectile weapons | null |
185427 | https://en.wikipedia.org/wiki/Function%20%28mathematics%29 | Function (mathematics) | In mathematics, a function from a set to a set assigns to each element of exactly one element of . The set is called the domain of the function and the set is called the codomain of the function.
Functions were originally the idealization of how a varying quantity depends on another quantity. For example, the pos... | Mathematics | Mathematics: General | null |
185663 | https://en.wikipedia.org/wiki/Division%20by%20zero | Division by zero | In mathematics, division by zero, division where the divisor (denominator) is zero, is a unique and problematic special case. Using fraction notation, the general example can be written as , where is the dividend (numerator).
The usual definition of the quotient in elementary arithmetic is the number which yields the... | Mathematics | Basics | null |
185684 | https://en.wikipedia.org/wiki/Galleon | Galleon | Galleons were large, multi-decked sailing ships developed in Spain and Portugal and first used as armed cargo carriers by Europeans from the 16th to 18th centuries during the Age of Sail and were the principal vessels drafted for use as warships until the Anglo-Dutch Wars of the mid-17th century. Galleons generally car... | Technology | Naval warfare | null |
185763 | https://en.wikipedia.org/wiki/Norma%20%28constellation%29 | Norma (constellation) | Norma is a small constellation in the Southern Celestial Hemisphere between Ara and Lupus, one of twelve drawn up in the 18th century by French astronomer Nicolas-Louis de Lacaille and one of several depicting scientific instruments. Its name is Latin for normal, referring to a right angle, and is variously considered ... | Physical sciences | Other | Astronomy |
185775 | https://en.wikipedia.org/wiki/Crucible | Crucible | A crucible is a container in which metals or other substances may be melted or subjected to very high temperatures. Although crucibles have historically tended to be made out of clay, they can be made from any material that withstands temperatures high enough to melt or otherwise alter its contents.
History
Typology ... | Technology | Metallurgy | null |
185848 | https://en.wikipedia.org/wiki/Propranolol | Propranolol | Propranolol is a medication of the beta blocker class. It is used to treat high blood pressure, some types of irregular heart rate, thyrotoxicosis, capillary hemangiomas, akathisia, performance anxiety, and essential tremors, as well to prevent migraine headaches, and to prevent further heart problems in those with ang... | Biology and health sciences | Specific drugs | Health |
185868 | https://en.wikipedia.org/wiki/Wireless | Wireless | Wireless communication (or just wireless, when the context allows) is the transfer of information (telecommunication) between two or more points without the use of an electrical conductor, optical fiber or other continuous guided medium for the transfer. The most common wireless technologies use radio waves. With radio... | Technology | Media and communication: Basics | null |
185887 | https://en.wikipedia.org/wiki/Respiratory%20failure | Respiratory failure | Respiratory failure results from inadequate gas exchange by the respiratory system, meaning that the arterial oxygen, carbon dioxide, or both cannot be kept at normal levels. A drop in the oxygen carried in the blood is known as hypoxemia; a rise in arterial carbon dioxide levels is called hypercapnia. Respiratory fail... | Biology and health sciences | Injury | null |
185901 | https://en.wikipedia.org/wiki/Subspecies | Subspecies | In biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species have subspecies, but for those that do there must be at least ... | Biology and health sciences | Taxonomic rank | Biology |
185982 | https://en.wikipedia.org/wiki/Home%20appliance | Home appliance | A home appliance, also referred to as a domestic appliance, an electric appliance or a household appliance, is a machine which assists in household functions such as cooking, cleaning and food preservation.
The domestic application attached to home appliance is tied to the definition of appliance as "an instrument or ... | Technology | Household appliances | null |
186108 | https://en.wikipedia.org/wiki/Color%20management | Color management | Color management is the process of ensuring consistent and accurate colors across various devices, such as monitors, printers, and cameras. It involves the use of color profiles, which are standardized descriptions of how colors should be displayed or reproduced.
Color management is necessary because different devices... | Technology | Computer science | null |
186182 | https://en.wikipedia.org/wiki/Evaporite | Evaporite | An evaporite () is a water-soluble sedimentary mineral deposit that results from concentration and crystallization by evaporation from an aqueous solution. There are two types of evaporite deposits: marine, which can also be described as ocean deposits, and non-marine, which are found in standing bodies of water such a... | Physical sciences | Sedimentary rocks | Earth science |
186193 | https://en.wikipedia.org/wiki/Sinkhole | Sinkhole | A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water enters into underground passages known as ponor, swallow hole or swallet. A ce... | Physical sciences | Caves | Earth science |
186229 | https://en.wikipedia.org/wiki/Raft | Raft | A raft is any flat structure for support or transportation over water. It is usually of basic design, characterized by the absence of a hull. Rafts are usually kept afloat by using any combination of buoyant materials such as wood, sealed barrels, or inflated air chambers (such as pontoons), and are typically not prope... | Technology | Naval transport | null |
186266 | https://en.wikipedia.org/wiki/ITunes | ITunes | iTunes is a media player, media library, and mobile device management utility developed by Apple. It is used to purchase, play, download and organize digital multimedia on personal computers running the macOS and Windows operating systems, and can be used to rip songs from CDs as well as playing content from dynamic, s... | Technology | Multimedia_2 | null |
186409 | https://en.wikipedia.org/wiki/Population%20bottleneck | Population bottleneck | A population bottleneck or genetic bottleneck is a sharp reduction in the size of a population due to environmental events such as famines, earthquakes, floods, fires, disease, and droughts; or human activities such as genocide, speciocide, widespread violence or intentional culling. Such events can reduce the variatio... | Biology and health sciences | Basics_4 | Biology |
186415 | https://en.wikipedia.org/wiki/Mojibake | Mojibake | Mojibake (; , 'character transformation') is the garbled or gibberish text that is the result of text being decoded using an unintended character encoding. The result is a systematic replacement of symbols with completely unrelated ones, often from a different writing system.
This display may include the generic repla... | Technology | Software development: General | null |
186468 | https://en.wikipedia.org/wiki/Wilkinson%20Microwave%20Anisotropy%20Probe | Wilkinson Microwave Anisotropy Probe | The Wilkinson Microwave Anisotropy Probe (WMAP), originally known as the Microwave Anisotropy Probe (MAP and Explorer 80), was a NASA spacecraft operating from 2001 to 2010 which measured temperature differences across the sky in the cosmic microwave background (CMB) – the radiant heat remaining from the Big Bang. Head... | Technology | Unmanned spacecraft | null |
186495 | https://en.wikipedia.org/wiki/Centipede | Centipede | Centipedes (from Neo-Latin , "hundred", and Latin , "foot") are predatory arthropods belonging to the class Chilopoda (Ancient Greek , kheilos, "lip", and Neo-Latin suffix , "foot", describing the forcipules) of the subphylum Myriapoda, an arthropod group which includes millipedes and other multi-legged animals. Centi... | Biology and health sciences | Myriapoda | null |
186622 | https://en.wikipedia.org/wiki/Old%20World%20vulture | Old World vulture | Old World vultures are vultures that are found in the Old World, i.e. the continents of Europe, Asia and Africa, and which belong to the family Accipitridae, which also includes eagles, buzzards, kites, and hawks.
Old World vultures are not closely related to the superficially similar New World vultures and condors, a... | Biology and health sciences | Accipitriformes and Falconiformes | null |
186630 | https://en.wikipedia.org/wiki/Cosmic%20Background%20Explorer | Cosmic Background Explorer | The Cosmic Background Explorer (COBE ), also referred to as Explorer 66, was a NASA satellite dedicated to cosmology, which operated from 1989 to 1993. Its goals were to investigate the cosmic microwave background radiation (CMB or CMBR) of the universe and provide measurements that would help shape the understanding ... | Technology | Unmanned spacecraft | null |
186633 | https://en.wikipedia.org/wiki/Bearded%20vulture | Bearded vulture | The bearded vulture (Gypaetus barbatus), also known as the lammergeier and ossifrage, is a very large bird of prey in the monotypic genus Gypaetus. The bearded vulture is the only known vertebrate whose diet consists of 70–90% bone.
Traditionally considered an Old World vulture, it actually forms a separate minor line... | Biology and health sciences | Accipitrimorphae | Animals |
186703 | https://en.wikipedia.org/wiki/George%20Washington%20Bridge | George Washington Bridge | The George Washington Bridge is a double-decked suspension bridge spanning the Hudson River, connecting Fort Lee in Bergen County, New Jersey, with the Washington Heights neighborhood of Manhattan, New York City. It is named after George Washington, a Founding Father of the United States and the country's first preside... | Technology | Bridges | null |
186716 | https://en.wikipedia.org/wiki/Intercity%20Express | Intercity Express | Intercity Express (commonly known as ICE () and running under this category) is a high-speed rail system in Germany. It also serves destinations in Austria, France, Belgium, Switzerland and the Netherlands as part of cross-border services. It is the flagship of the German state railway, Deutsche Bahn. ICE fares are fix... | Technology | High-speed rail | null |
186725 | https://en.wikipedia.org/wiki/Agronomy | Agronomy | Agronomy is the science and technology of producing and using plants by agriculture for food, fuel, fiber, chemicals, recreation, or land conservation. Agronomy has come to include research of plant genetics, plant physiology, meteorology, and soil science. It is the application of a combination of sciences such as bio... | Technology | Basics_2 | null |
186749 | https://en.wikipedia.org/wiki/Narcissistic%20personality%20disorder | Narcissistic personality disorder | Narcissistic personality disorder (NPD) is a personality disorder characterized by a life-long pattern of exaggerated feelings of self-importance, an excessive need for admiration, and a diminished ability to empathize with other people's feelings. Narcissistic personality disorder is one of the sub-types of the broade... | Biology and health sciences | Mental disorders | Health |
186919 | https://en.wikipedia.org/wiki/Stirling%20engine | Stirling engine | A Stirling engine is a heat engine that is operated by the cyclic expansion and contraction of air or other gas (the working fluid) by exposing it to different temperatures, resulting in a net conversion of heat energy to mechanical work.
More specifically, the Stirling engine is a closed-cycle regenerative heat engi... | Physical sciences | Thermodynamics | Physics |
187022 | https://en.wikipedia.org/wiki/Cupronickel | Cupronickel | Cupronickel or copper–nickel (CuNi) is an alloy of copper with nickel, usually along with small quantities of other metals added for strength, such as iron and manganese. The copper content typically varies from 60 to 90 percent. (Monel is a nickel–copper alloy that contains a minimum of 52 percent nickel.)
Despite it... | Physical sciences | Copper alloys | Chemistry |
187240 | https://en.wikipedia.org/wiki/Quadratic%20function | Quadratic function | In mathematics, a quadratic function of a single variable is a function of the form
where is its variable, and , , and are coefficients. The expression , especially when treated as an object in itself rather than as a function, is a quadratic polynomial, a polynomial of degree two. In elementary mathematics a polyno... | Mathematics | Specific functions | null |
7480138 | https://en.wikipedia.org/wiki/Ixora | Ixora | Ixora is a genus of flowering plants in the family Rubiaceae. It is the only genus in the tribe Ixoreae. It consists of tropical evergreen trees and shrubs and holds around 544 species. Though native to the tropical and subtropical areas throughout the world, its centre of diversity is in Tropical Asia. Ixora also grow... | Biology and health sciences | Gentianales | Plants |
7481381 | https://en.wikipedia.org/wiki/Dosage%20form | Dosage form | Dosage forms (also called unit doses) are pharmaceutical drug products presented in a specific form for use. They contain a mixture of active ingredients and inactive components (excipients), configured in a particular way (such as a capsule shell) and apportioned into a specific dose. For example, two products may bot... | Biology and health sciences | General concepts_2 | Health |
7481866 | https://en.wikipedia.org/wiki/Detachment%20fault | Detachment fault | A detachment fault is a gently dipping normal fault associated with large-scale extensional tectonics. Detachment faults often have very large displacements (tens of km) and juxtapose unmetamorphosed hanging walls against medium to high-grade metamorphic footwalls that are called metamorphic core complexes. They are th... | Physical sciences | Structural geology | Earth science |
64976 | https://en.wikipedia.org/wiki/Attention%20deficit%20hyperactivity%20disorder | Attention deficit hyperactivity disorder | Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterized by executive dysfunction occasioning symptoms of inattention, hyperactivity, impulsivity and emotional dysregulation that are excessive and pervasive, impairing in multiple contexts, and developmentally-inappropriate.
ADHD s... | Biology and health sciences | Mental disorder | null |
64993 | https://en.wikipedia.org/wiki/Skin%20cancer | Skin cancer | Skin cancers are cancers that arise from the skin. They are due to the development of abnormal cells that have the ability to invade or spread to other parts of the body. It occurs when skin cells grow uncontrollably, forming malignant tumors. The primary cause of skin cancer is prolonged exposure to ultraviolet (UV) r... | Biology and health sciences | Cancer | null |
65009 | https://en.wikipedia.org/wiki/Damselfly | Damselfly | Damselflies are flying insects of the suborder Zygoptera in the order Odonata. They are similar to dragonflies (which constitute the other odonatan suborder, Epiprocta) but are usually smaller and have slimmer bodies. Most species fold the wings along the body when at rest, unlike dragonflies which hold the wings flat ... | Biology and health sciences | Odonata | null |
65037 | https://en.wikipedia.org/wiki/Tire | Tire | A tire (British spelling: tyre) is a ring-shaped component that surrounds a wheel's rim to transfer a vehicle's load from the axle through the wheel to the ground and to provide traction on the surface over which the wheel travels. Most tires, such as those for automobiles and bicycles, are pneumatically inflated struc... | Technology | Road transport | null |
65085 | https://en.wikipedia.org/wiki/Triticale | Triticale | Triticale (; × Triticosecale) is a hybrid of wheat (Triticum) and rye (Secale) first bred in laboratories during the late 19th century in Scotland and Germany. Commercially available triticale is almost always a second-generation hybrid, i.e., a cross between two kinds of primary (first-cross) triticales. As a rule, tr... | Biology and health sciences | Grains | Plants |
65091 | https://en.wikipedia.org/wiki/Pika | Pika | A pika ( , or ) is a small, mountain-dwelling mammal native to Asia and North America. With short limbs, a very round body, an even coat of fur, and no external tail, they resemble their close relative, the rabbit, but with short, rounded ears. The large-eared pika of the Himalayas and nearby mountains lives at elevat... | Biology and health sciences | Lagomorphs | Animals |
65192 | https://en.wikipedia.org/wiki/Three%20Gorges%20Dam | Three Gorges Dam | The Three Gorges Dam () is a hydroelectric gravity dam that spans the Yangtze River near Sandouping in Yiling District, Yichang, Hubei province, central China, downstream of the Three Gorges. The world's largest power station by installed capacity (22,500 MW), the Three Gorges Dam generates 95±20 TWh of electricity per... | Technology | Hydraulic infrastructure | null |
65195 | https://en.wikipedia.org/wiki/Kimura%20spider | Kimura spider | Heptathela kimurai, the Kimura spider, or kimura-gumo (in Japanese), is an Old World spider, found primarily in Japan and named after Arika Kimura, who collected it in 1920. It belongs to the sub-order Mesothelae (primitive burrowing spiders) and can reach up to 3 cm in length. Its burrows are covered by a camouflaged ... | Biology and health sciences | Spiders | Animals |
65316 | https://en.wikipedia.org/wiki/Canna%20%28plant%29 | Canna (plant) | Canna or canna lily is the only genus of flowering plants in the family Cannaceae, consisting of 10 species. All of the genus's species are native to the American tropics and were naturalized in Europe, India and Africa in the 1860s. Although they grow native to the tropics, most cultivars have been developed in temper... | Biology and health sciences | Monocots | null |
65344 | https://en.wikipedia.org/wiki/SIDS | SIDS | Sudden infant death syndrome (SIDS), sometimes known as cot death or crib death, is the sudden unexplained death of a child of less than one year of age. Diagnosis requires that the death remain unexplained even after a thorough autopsy and detailed death scene investigation. SIDS usually occurs during sleep. Typically... | Biology and health sciences | Specific diseases | Health |
65424 | https://en.wikipedia.org/wiki/Hydraulics | Hydraulics | Hydraulics () is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids. At a very basic level, hydraulics is the liquid counterpart of pneumatics, which concerns gases. Fluid mechanics provides the theoretical foundation for hydraulics, ... | Technology | Hydraulics and pneumatics | null |
65452 | https://en.wikipedia.org/wiki/Galangal | Galangal | Galangal () is a common name for several tropical rhizomatous spices.
Differentiation
The word galangal, or its variant galanga or archaically galingale, can refer in common usage to the aromatic rhizome of any of four plant species in the Zingiberaceae (ginger) family, namely:
Alpinia galanga, also called greater ga... | Biology and health sciences | Herbs and spices | Plants |
65465 | https://en.wikipedia.org/wiki/Petroleum%20engineering | Petroleum engineering | Petroleum engineering is a field of engineering concerned with the activities related to the production of hydrocarbons, which can be either crude oil or natural gas. Exploration and production are deemed to fall within the upstream sector of the oil and gas industry. Exploration, by earth scientists, and petroleum eng... | Technology | Disciplines | null |
65546 | https://en.wikipedia.org/wiki/Boric%20acid | Boric acid | Boric acid, more specifically orthoboric acid, is a compound of boron, oxygen, and hydrogen with formula . It may also be called hydrogen orthoborate, trihydroxidoboron or boracic acid. It is usually encountered as colorless crystals or a white powder, that dissolves in water, and occurs in nature as the mineral sassol... | Physical sciences | Inorganic compounds | null |
65555 | https://en.wikipedia.org/wiki/Antiseptic | Antiseptic | An antiseptic ( and ) is an antimicrobial substance or compound that is applied to living tissue to reduce the possibility of sepsis, infection, or putrefaction. Antiseptics are generally distinguished from antibiotics by the latter's ability to safely destroy bacteria within the body, and from disinfectants, which des... | Biology and health sciences | Anti-infectives | Health |
65559 | https://en.wikipedia.org/wiki/Borate | Borate | A borate is any of a range of boron oxyanions, anions containing boron and oxygen, such as orthoborate , metaborate , or tetraborate ; or any salt of such anions, such as sodium metaborate, and borax . The name also refers to esters of such anions, such as trimethyl borate but they are alkoxides.
Natural occurrence
... | Physical sciences | Boric oxyanions | Chemistry |
65560 | https://en.wikipedia.org/wiki/Borax | Borax | Borax (also referred to as sodium borate, tincal () and tincar ()) is a salt (ionic compound), a hydrated or anhydrous borate of sodium, with the chemical formula .
It is a colorless crystalline solid that dissolves in water to make a basic solution.
It is commonly available in powder or granular form and has many in... | Physical sciences | Boric oxyanions | Chemistry |
65574 | https://en.wikipedia.org/wiki/M4%20Sherman | M4 Sherman | The M4 Sherman, officially medium tank, M4, was the medium tank most widely used by the United States and Western Allies in World War II. The M4 Sherman proved to be reliable, relatively cheap to produce, and available in great numbers. It was also the basis of several other armored fighting vehicles including self-pro... | Technology | Specific armor | null |
65593 | https://en.wikipedia.org/wiki/Ruler | Ruler | A ruler, sometimes called a rule, scale or a line gauge or metre/meter stick, is an instrument used to make length measurements, whereby a length is read from a series of markings called "rules" along an edge of the device. Usually, the instrument is rigid and the edge itself is a straightedge ("ruled straightedge"), w... | Technology | Measuring instruments | null |
65637 | https://en.wikipedia.org/wiki/Metrology | Metrology | Metrology is the scientific study of measurement. It establishes a common understanding of units, crucial in linking human activities. Modern metrology has its roots in the French Revolution's political motivation to standardise units in France when a length standard taken from a natural source was proposed. This led t... | Physical sciences | Measurement: General | null |
65672 | https://en.wikipedia.org/wiki/Spinning%20wheel | Spinning wheel | A spinning wheel is a device for spinning thread or yarn from fibres. It was fundamental to the cotton textile industry prior to the Industrial Revolution. It laid the foundations for later machinery such as the spinning jenny and spinning frame, which displaced the spinning wheel during the Industrial Revolution.
Fun... | Technology | Spinning | null |
65685 | https://en.wikipedia.org/wiki/Volkswagen%20Beetle | Volkswagen Beetle | The Volkswagen Beetle, officially the Volkswagen Type 1, is a small family car produced by the German company Volkswagen from 1938 to 2003. One of the most iconic cars in automotive history, the Beetle is noted for its distinctive shape. Its production period of 65 years is the longest of any single generation of autom... | Technology | Specific automobiles | null |
65827 | https://en.wikipedia.org/wiki/Silicone | Silicone | In organosilicon and polymer chemistry, a silicone or polysiloxane is a polymer composed of repeating units of siloxane (, where R = organic group). They are typically colorless oils or rubber-like substances. Silicones are used in sealants, adhesives, lubricants, medicine, cooking utensils, thermal insulation, and e... | Physical sciences | Organic compounds | null |
65845 | https://en.wikipedia.org/wiki/Hypothyroidism | Hypothyroidism | Hypothyroidism (also called underactive thyroid, low thyroid or hypothyreosis) is a disorder of the endocrine system in which the thyroid gland does not produce enough thyroid hormones. It can cause a number of symptoms, such as poor ability to tolerate cold, extreme fatigue, muscle aches, constipation, slow heart rate... | Biology and health sciences | Specific diseases | Health |
65847 | https://en.wikipedia.org/wiki/Vitiligo | Vitiligo | Vitiligo (, ) is a chronic autoimmune disorder that causes patches of skin to lose pigment or color. The cause of vitiligo is unknown, but it may be related to immune system changes, genetic factors, stress, or sun exposure. Treatment options include topical medications, light therapy, surgery and cosmetics. The condit... | Biology and health sciences | Specific diseases | Health |
65880 | https://en.wikipedia.org/wiki/Cassette%20tape | Cassette tape | The Compact Cassette, also commonly called a cassette tape, audio cassette, or simply tape or cassette, is an analog magnetic tape recording format for audio recording and playback. Invented by Lou Ottens and his team at the Dutch company Philips, the Compact Cassette was released in August 1963.
Compact Cassettes co... | Technology | Media and communication: Basics | null |
65886 | https://en.wikipedia.org/wiki/Microphone | Microphone | A microphone, colloquially called a mic (), or mike, is a transducer that converts sound into an electrical signal. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public events, motion picture production, live and recorded audio engineering, soun... | Technology | Media and communication | null |
65888 | https://en.wikipedia.org/wiki/Electromagnetic%20induction | Electromagnetic induction | Electromagnetic or magnetic induction is the production of an electromotive force (emf) across an electrical conductor in a changing magnetic field.
Michael Faraday is generally credited with the discovery of induction in 1831, and James Clerk Maxwell mathematically described it as Faraday's law of induction. Lenz's l... | Physical sciences | Electrodynamics | null |
65890 | https://en.wikipedia.org/wiki/Magnetic%20flux | Magnetic flux | In physics, specifically electromagnetism, the magnetic flux through a surface is the surface integral of the normal component of the magnetic field B over that surface. It is usually denoted or . The SI unit of magnetic flux is the weber (Wb; in derived units, volt–seconds or V⋅s), and the CGS unit is the maxwell. M... | Physical sciences | Magnetostatics | Physics |
65894 | https://en.wikipedia.org/wiki/Electromotive%20force | Electromotive force | In electromagnetism and electronics, electromotive force (also electromotance, abbreviated emf, denoted ) is an energy transfer to an electric circuit per unit of electric charge, measured in volts. Devices called electrical transducers provide an emf by converting other forms of energy into electrical energy. Other ty... | Physical sciences | Electrodynamics | null |
65905 | https://en.wikipedia.org/wiki/Ideal%20gas | Ideal gas | An ideal gas is a theoretical gas composed of many randomly moving point particles that are not subject to interparticle interactions. The ideal gas concept is useful because it obeys the ideal gas law, a simplified equation of state, and is amenable to analysis under statistical mechanics. The requirement of zero inte... | Physical sciences | Thermodynamics | Physics |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.