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1951295 | https://en.wikipedia.org/wiki/Blister%20beetle | Blister beetle | Blister beetles are beetles of the family Meloidae, so called for their defensive secretion of a blistering agent, cantharidin. About 7,500 species are known worldwide. Many are conspicuous and some are aposematically colored, announcing their toxicity to would-be predators.
Description
Blister beetles are hypermetam... | Biology and health sciences | Beetles (Coleoptera) | Animals |
1951419 | https://en.wikipedia.org/wiki/Critical%20point%20%28thermodynamics%29 | Critical point (thermodynamics) | In thermodynamics, a critical point (or critical state) is the end point of a phase equilibrium curve. One example is the liquid–vapor critical point, the end point of the pressure–temperature curve that designates conditions under which a liquid and its vapor can coexist. At higher temperatures, the gas comes into a s... | Physical sciences | Phase transitions | null |
1951424 | https://en.wikipedia.org/wiki/Critical%20point%20%28mathematics%29 | Critical point (mathematics) | In mathematics, a critical point is the argument of a function where the function derivative is zero (or undefined, as specified below).
The value of the function at a critical point is a .
More specifically, when dealing with functions of a real variable, a critical point, also known as a stationary point, is a point... | Mathematics | Functions: General | null |
18821046 | https://en.wikipedia.org/wiki/Chickenpox | Chickenpox | Chickenpox, also known as varicella ( ), is a highly contagious disease caused by varicella zoster virus (VZV), a member of the herpesvirus family. The disease results in a characteristic skin rash that forms small, itchy blisters, which eventually scab over. It usually starts on the chest, back, and face. It then spre... | Biology and health sciences | Infectious disease | null |
21091725 | https://en.wikipedia.org/wiki/Insulin%20%28medication%29 | Insulin (medication) | As a medication, insulin is any pharmaceutical preparation of the protein hormone insulin that is used to treat high blood glucose. Such conditions include type 1 diabetes, type 2 diabetes, gestational diabetes, and complications of diabetes such as diabetic ketoacidosis and hyperosmolar hyperglycemic states. Insulin i... | Biology and health sciences | Specific drugs | Health |
13127410 | https://en.wikipedia.org/wiki/Oberth%20effect | Oberth effect | In astronautics, a powered flyby, or Oberth maneuver, is a maneuver in which a spacecraft falls into a gravitational well and then uses its engines to further accelerate as it is falling, thereby achieving additional speed. The resulting maneuver is a more efficient way to gain kinetic energy than applying the same imp... | Physical sciences | Orbital mechanics | Astronomy |
6510422 | https://en.wikipedia.org/wiki/Caenagnathidae | Caenagnathidae | Caenagnathidae is a family of derived caenagnathoid dinosaurs from the Cretaceous of North America and Asia. They are a member of the Oviraptorosauria, and relatives of the Oviraptoridae. Like other oviraptorosaurs, caenagnathids had specialized beaks, long necks, and short tails, and would have been covered in feather... | Biology and health sciences | Theropods | Animals |
6512121 | https://en.wikipedia.org/wiki/Igneous%20intrusion | Igneous intrusion | In geology, an igneous intrusion (or intrusive body or simply intrusion) is a body of intrusive igneous rock that forms by crystallization of magma slowly cooling below the surface of the Earth. Intrusions have a wide variety of forms and compositions, illustrated by examples like the Palisades Sill of New York and New... | Physical sciences | Igneous rocks | Earth science |
141264 | https://en.wikipedia.org/wiki/Prismatic%20blade | Prismatic blade | In archaeology, a prismatic blade is a long, narrow, specialized stone flake tool with a sharp edge, like a small razor blade. Prismatic blades are flaked from stone cores through pressure flaking or direct percussion. This process results in a very standardized finished tool and waste assemblage. The most famous and m... | Technology | Hand tools | null |
141496 | https://en.wikipedia.org/wiki/Depth%20charge | Depth charge | A depth charge is an anti-submarine warfare (ASW) weapon designed to destroy submarines by detonating in the water near the target and subjecting it to a destructive hydraulic shock. Most depth charges use high explosives with a fuze set to detonate the charge, typically at a specific depth from the surface. Depth char... | Technology | Naval warfare | null |
141738 | https://en.wikipedia.org/wiki/Comet%20Hyakutake | Comet Hyakutake | Comet Hyakutake (formally designated C/1996 B2) is a comet discovered on 31 January 1996. It was dubbed the Great Comet of 1996; its passage to within of the Earth on 25 March was one of the closest cometary approaches of the previous 200 years. Reaching an apparent visual magnitude of zero and spanning nearly 80°, Hy... | Physical sciences | Notable comets | Astronomy |
141828 | https://en.wikipedia.org/wiki/Isthmus | Isthmus | An isthmus (; : isthmuses or isthmi) is a narrow piece of land connecting two larger areas across an expanse of water by which they are otherwise separated. A tombolo is an isthmus that consists of a spit or bar, and a strait is the sea counterpart of an isthmus, a narrow stretch of sea between two landmasses that conn... | Physical sciences | Oceanic and coastal landforms | Earth science |
141888 | https://en.wikipedia.org/wiki/Aluminium%20oxide | Aluminium oxide | Aluminium oxide (or aluminium(III) oxide) is a chemical compound of aluminium and oxygen with the chemical formula . It is the most commonly occurring of several aluminium oxides, and specifically identified as aluminium oxide. It is commonly called alumina and may also be called aloxide, aloxite, or alundum in various... | Physical sciences | Oxide salts | Chemistry |
141915 | https://en.wikipedia.org/wiki/Fentanyl | Fentanyl | Fentanyl is a highly potent synthetic piperidine opioid primarily used as an analgesic. It is 30 to 50 times more potent than heroin and 100 times more potent than morphine; its primary clinical utility is in pain management for cancer patients and those recovering from painful surgeries. Fentanyl is also used as a sed... | Biology and health sciences | Pain treatments | Health |
141922 | https://en.wikipedia.org/wiki/Steroid | Steroid | A steroid is an organic compound with four fused rings (designated A, B, C, and D) arranged in a specific molecular configuration.
Steroids have two principal biological functions: as important components of cell membranes that alter membrane fluidity; and as signaling molecules. Examples include the lipid cholester... | Biology and health sciences | Biochemistry and molecular biology | null |
142100 | https://en.wikipedia.org/wiki/Hydride | Hydride | In chemistry, a hydride is formally the anion of hydrogen (H−), a hydrogen ion with two electrons. In modern usage, this is typically only used for ionic bonds, but it is sometimes (and more frequently in the past) been applied to all compounds containing covalently bound H atoms. In this broad and potentially archaic ... | Physical sciences | Hydride salts | Chemistry |
142425 | https://en.wikipedia.org/wiki/Herpetology | Herpetology | Herpetology (from Greek ἑρπετόν herpetón, meaning "reptile" or "creeping animal") is a branch of zoology concerned with the study of amphibians (including frogs, salamanders, and caecilians (Gymnophiona)) and reptiles (including snakes, lizards, turtles, crocodilians, and tuataras). Birds, which are cladistically inclu... | Biology and health sciences | Basics_2 | Biology |
142431 | https://en.wikipedia.org/wiki/Homology%20%28biology%29 | Homology (biology) | In biology, homology is similarity in anatomical structures or genes between organisms of different taxa due to shared ancestry, regardless of current functional differences. Evolutionary biology explains homologous structures as retained heredity from a common ancestor after having been subjected to adaptive modificat... | Biology and health sciences | Basics_4 | Biology |
142432 | https://en.wikipedia.org/wiki/Homology%20%28mathematics%29 | Homology (mathematics) | In mathematics, the term homology, originally introduced in algebraic topology, has three primary, closely-related usages. The most direct usage of the term is to take the homology of a chain complex, resulting in a sequence of abelian groups called homology groups. This operation, in turn, allows one to associate vari... | Mathematics | Geometry | null |
142440 | https://en.wikipedia.org/wiki/Climatology | Climatology | Climatology (from Greek , klima, "slope"; and , -logia) or climate science is the scientific study of Earth's climate, typically defined as weather conditions averaged over a period of at least 30 years. Climate concerns the atmospheric condition during an extended to indefinite period of time; weather is the condition... | Physical sciences | Climatology | null |
142473 | https://en.wikipedia.org/wiki/Plantation | Plantation | Plantations are farms specializing in cash crops, usually mainly planting a single crop, with perhaps ancillary areas for vegetables for eating and so on. Plantations, centered on a plantation house, grow crops including cotton, cannabis, coffee, tea, cocoa, sugar cane, opium, sisal, oil seeds, oil palms, fruits, rubb... | Technology | Agriculture_2 | null |
142475 | https://en.wikipedia.org/wiki/Papermaking | Papermaking | Papermaking is the manufacture of paper and cardboard, which are used widely for printing, writing, and packaging, among many other purposes. Today almost all paper is made using industrial machinery, while handmade paper survives as a specialized craft and a medium for artistic expression.
In papermaking, a dilute su... | Technology | Materials | null |
142488 | https://en.wikipedia.org/wiki/Harmonic%20series%20%28mathematics%29 | Harmonic series (mathematics) | In mathematics, the harmonic series is the infinite series formed by summing all positive unit fractions:
The first terms of the series sum to approximately , where is the natural logarithm and is the Euler–Mascheroni constant. Because the logarithm has arbitrarily large values, the harmonic series does not have a ... | Mathematics | Sequences and series | null |
142523 | https://en.wikipedia.org/wiki/Halothane | Halothane | Halothane, sold under the brand name Fluothane among others, is a general anaesthetic. It can be used to induce or maintain anaesthesia. One of its benefits is that it does not increase the production of saliva, which can be particularly useful in those who are difficult to intubate. It is given by inhalation.
Side ef... | Biology and health sciences | Anesthetics | Health |
142534 | https://en.wikipedia.org/wiki/Electron%20hole | Electron hole | In physics, chemistry, and electronic engineering, an electron hole (often simply called a hole) is a quasiparticle denoting the lack of an electron at a position where one could exist in an atom or atomic lattice. Since in a normal atom or crystal lattice the negative charge of the electrons is balanced by the positi... | Physical sciences | States of matter | Physics |
142586 | https://en.wikipedia.org/wiki/Domestication | Domestication | Domestication is a multi-generational mutualistic relationship in which an animal species, such as humans or leafcutter ants, takes over control and care of another species, such as sheep or fungi, to obtain from them a steady supply of resources, such as meat, milk, or labor. The process is gradual and geographically ... | Technology | Food and health | null |
142660 | https://en.wikipedia.org/wiki/Bridge%20of%20Sighs | Bridge of Sighs | The Bridge of Sighs (Italian: Ponte dei Sospiri, ) is a bridge in Venice, Italy. The enclosed bridge is made of white limestone, has windows with stone bars, passes over the Rio di Palazzo, and connects the New Prison (Prigioni Nuove) to the interrogation rooms in the Doge's Palace. It was designed by Antonio Contin, w... | Technology | Bridges | null |
142759 | https://en.wikipedia.org/wiki/Interceptor%20aircraft | Interceptor aircraft | An interceptor aircraft, or simply interceptor, is a type of fighter aircraft designed specifically for the defensive interception role against an attacking enemy aircraft, particularly bombers and reconnaissance aircraft. Aircraft that are capable of being or are employed as both "standard" air superiority fighters an... | Technology | Military aviation | null |
142813 | https://en.wikipedia.org/wiki/Azalea | Azalea | Azaleas ( ) are flowering shrubs in the genus Rhododendron, particularly the former sections Tsutsusi (evergreen) and Pentanthera (deciduous). Azaleas bloom in the spring (April and May in the temperate Northern Hemisphere, and October and November in the Southern Hemisphere), their flowers often lasting several week... | Biology and health sciences | Ericales | null |
142818 | https://en.wikipedia.org/wiki/Naloxone | Naloxone | Naloxone, sold under the brand name Narcan among others, is an opioid antagonist, a medication used to reverse or reduce the effects of opioids. For example, it is used to restore breathing after an opioid overdose. Effects begin within two minutes when given intravenously, five minutes when injected into a muscle, and... | Biology and health sciences | Specific drugs | Health |
142821 | https://en.wikipedia.org/wiki/Placebo | Placebo | A placebo ( ) is a substance or treatment which is designed to have no therapeutic value. Common placebos include inert tablets (like sugar pills), inert injections (like saline), sham surgery, and other procedures.
Placebos are used in randomized clinical trials to test the efficacy of medical treatments. In a placeb... | Biology and health sciences | Drugs and pharmacology | null |
142839 | https://en.wikipedia.org/wiki/Stone%20tool | Stone tool | Stone tools have been used throughout human history but are most closely associated with prehistoric cultures and in particular those of the Stone Age. Stone tools may be made of either ground stone or knapped stone, the latter fashioned by a craftsman called a flintknapper. Stone has been used to make a wide variety o... | Technology | Hand tools | null |
142854 | https://en.wikipedia.org/wiki/Narcissus%20%28plant%29 | Narcissus (plant) | Narcissus is a genus of predominantly spring flowering perennial plants of the amaryllis family, Amaryllidaceae. Various common names including daffodil, narcissus (plural narcissi), and jonquil, are used to describe some or all members of the genus. Narcissus has conspicuous flowers with six petal-like tepals surmoun... | Biology and health sciences | Monocots | null |
142867 | https://en.wikipedia.org/wiki/Ferret | Ferret | The ferret (Mustela furo) is a small, domesticated species belonging to the family Mustelidae. The ferret is most likely a domesticated form of the wild European polecat (Mustela putorius), as evidenced by the ferret's ability to interbreed with European polecats and produce hybrid offspring. Physically, ferrets resemb... | Biology and health sciences | Mustelidae | Animals |
142905 | https://en.wikipedia.org/wiki/Sea%20turtle | Sea turtle | Sea turtles (superfamily Chelonioidea), sometimes called marine turtles, are reptiles of the order Testudines and of the suborder Cryptodira. The seven existing species of sea turtles are the flatback, green, hawksbill, leatherback, loggerhead, Kemp's ridley, and olive ridley.
Six of the seven sea turtle species, all b... | Biology and health sciences | Reptiles | null |
142981 | https://en.wikipedia.org/wiki/UNIVAC%20I | UNIVAC I | The UNIVAC I (Universal Automatic Computer I) was the first general-purpose electronic digital computer design for business application produced in the United States. It was designed principally by J. Presper Eckert and John Mauchly, the inventors of the ENIAC. Design work was started by their company, Eckert–Mauchly ... | Technology | Early computers | null |
143023 | https://en.wikipedia.org/wiki/Equatorial%20bulge | Equatorial bulge | An equatorial bulge is a difference between the equatorial and polar diameters of a planet, due to the centrifugal force exerted by the rotation about the body's axis. A rotating body tends to form an oblate spheroid rather than a sphere.
On Earth
The planet Earth has a rather slight equatorial bulge; its equatorial ... | Physical sciences | Earth science basics: General | Earth science |
143115 | https://en.wikipedia.org/wiki/Astrophotography | Astrophotography | Astrophotography, also known as astronomical imaging, is the photography or imaging of astronomical objects, celestial events, or areas of the night sky. The first photograph of an astronomical object (the Moon) was taken in 1840, but it was not until the late 19th century that advances in technology allowed for detail... | Physical sciences | Astronomy basics | Astronomy |
143129 | https://en.wikipedia.org/wiki/Ethylene%20glycol | Ethylene glycol | Ethylene glycol (IUPAC name: ethane-1,2-diol) is an organic compound (a vicinal diol) with the formula . It is mainly used for two purposes: as a raw material in the manufacture of polyester fibers and for antifreeze formulations. It is an odorless, colorless, flammable, viscous liquid. It has a sweet taste, but is tox... | Physical sciences | Alcohols | Chemistry |
143135 | https://en.wikipedia.org/wiki/Parity%20%28mathematics%29 | Parity (mathematics) | In mathematics, parity is the property of an integer of whether it is even or odd. An integer is even if it is divisible by 2, and odd if it is not. For example, −4, 0, and 82 are even numbers, while −3, 5, 7, and 21 are odd numbers.
The above definition of parity applies only to integer numbers, hence it cannot be ap... | Mathematics | Basics | null |
24079760 | https://en.wikipedia.org/wiki/Virtual%20state | Virtual state | In quantum physics, a virtual state is a very short-lived, unobservable quantum state.
In many quantum processes a virtual state is an intermediate state, sometimes described as "imaginary" in a multi-step process that mediates otherwise forbidden transitions. Since virtual states are not eigenfunctions of any operat... | Physical sciences | Quantum mechanics | Physics |
24082423 | https://en.wikipedia.org/wiki/Mass%E2%80%93luminosity%20relation | Mass–luminosity relation | In astrophysics, the mass–luminosity relation is an equation giving the relationship between a star's mass and its luminosity, first noted by Jakob Karl Ernst Halm. The relationship is represented by the equation:
where and are the luminosity and mass of the Sun and . The value is commonly used for main-sequence st... | Physical sciences | Stellar astronomy | Astronomy |
24083865 | https://en.wikipedia.org/wiki/Coastal%20fish | Coastal fish | Coastal fish, also called inshore fish or neritic fish, inhabit the sea between the shoreline and the edge of the continental shelf. Since the continental shelf is usually less than deep, it follows that pelagic coastal fish are generally epipelagic fish, inhabiting the sunlit epipelagic zone. Coastal fish can be cont... | Biology and health sciences | Fishes by habitat | Animals |
8481594 | https://en.wikipedia.org/wiki/Co-orbital%20configuration | Co-orbital configuration | In astronomy, a co-orbital configuration is a configuration of two or more astronomical objects (such as asteroids, moons, or planets) orbiting at the same, or very similar, distance from their primary; i.e., they are in a 1:1 mean-motion resonance. (or 1:-1 if orbiting in opposite directions).
There are several class... | Physical sciences | Orbital mechanics | Astronomy |
8482163 | https://en.wikipedia.org/wiki/Magnetosphere%20of%20Jupiter | Magnetosphere of Jupiter | The magnetosphere of Jupiter is the cavity created in the solar wind by Jupiter's magnetic field. Extending up to seven million kilometers in the Sun's direction and almost to the orbit of Saturn in the opposite direction, Jupiter's magnetosphere is the largest and most powerful of any planetary magnetosphere in the So... | Physical sciences | Solar System | Astronomy |
296838 | https://en.wikipedia.org/wiki/Universe%20%28mathematics%29 | Universe (mathematics) | In mathematics, and particularly in set theory, category theory, type theory, and the foundations of mathematics, a universe is a collection that contains all the entities one wishes to consider in a given situation.
In set theory, universes are often classes that contain (as elements) all sets for which one hopes to ... | Mathematics | Set theory | null |
296928 | https://en.wikipedia.org/wiki/Domestic%20turkey | Domestic turkey | The domestic turkey (Meleagris gallopavo domesticus) is a large fowl, one of the two species in the genus Meleagris and the same species as the wild turkey. Although turkey domestication was thought to have occurred in central Mesoamerica at least 2,000 years ago, recent research suggests a possible second domesticatio... | Biology and health sciences | Galliformes | null |
296936 | https://en.wikipedia.org/wiki/Golden%20pheasant | Golden pheasant | The golden pheasant (Chrysolophus pictus), also known as the Chinese pheasant, and rainbow pheasant, is a gamebird of the order Galliformes (gallinaceous birds) and the family Phasianidae (pheasants). The genus name is from Ancient Greek khrusolophos, "with golden crest", and pictus is Latin for "painted" from pingere,... | Biology and health sciences | Galliformes | Animals |
296942 | https://en.wikipedia.org/wiki/Double%20counting%20%28proof%20technique%29 | Double counting (proof technique) | In combinatorics, double counting, also called counting in two ways, is a combinatorial proof technique for showing that two expressions are equal by demonstrating that they are two ways of counting the size of one set. In this technique, which call "one of the most important tools in combinatorics", one describes a f... | Mathematics | Combinatorics | null |
296994 | https://en.wikipedia.org/wiki/Bottlenose%20dolphin | Bottlenose dolphin | The bottlenose dolphin is a toothed whale in the genus Tursiops. They are common, cosmopolitan members of the family Delphinidae, the family of oceanic dolphins. Molecular studies show the genus contains three species: the common bottlenose dolphin (Tursiops truncatus), the Indo-Pacific bottlenose dolphin (Tursiops adu... | Biology and health sciences | Toothed whale | Animals |
297066 | https://en.wikipedia.org/wiki/Transistor%20radio | Transistor radio | A transistor radio is a small portable radio receiver that uses transistor-based circuitry. Previous portable radios used vacuum tubes, which were bulky, fragile, had a limited lifetime, consumed excessive power and required large heavy batteries. Following the invention of the transistor in 1947—which revolutionize... | Technology | Broadcasting | null |
297071 | https://en.wikipedia.org/wiki/Wild%20turkey | Wild turkey | The wild turkey (Meleagris gallopavo) is an upland game bird native to North America, one of two extant species of turkey and the heaviest member of the order Galliformes. It is the ancestor to the domestic turkey (M. g. domesticus), which was originally derived from a southern Mexican subspecies of wild turkey (not th... | Biology and health sciences | Galliformes | Animals |
297117 | https://en.wikipedia.org/wiki/Hydrofluoric%20acid | Hydrofluoric acid | Hydrofluoric acid is a solution of hydrogen fluoride (HF) in water. Solutions of HF are colorless, acidic and highly corrosive. A common concentration is 49% (48-52%) but there are also stronger solutions (e.g. 70%) and pure HF has a boiling point near room temperature. It is used to make most fluorine-containing compo... | Physical sciences | Inorganic compounds | null |
297203 | https://en.wikipedia.org/wiki/Blast%20furnace | Blast furnace | A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally pig iron, but also others such as lead or copper. Blast refers to the combustion air being supplied above atmospheric pressure.
In a blast furnace, fuel (coke), ores, and flux (limestone) are continuously supp... | Technology | Metallurgy | null |
297350 | https://en.wikipedia.org/wiki/Pharmacy | Pharmacy | Pharmacy is the science and practice of discovering, producing, preparing, dispensing, reviewing and monitoring medications, aiming to ensure the safe, effective, and affordable use of medicines. It is a miscellaneous science as it links health sciences with pharmaceutical sciences and natural sciences. The professiona... | Biology and health sciences | Drugs and pharmacology | null |
297382 | https://en.wikipedia.org/wiki/Quantitative%20genetics | Quantitative genetics | Quantitative genetics is the study of quantitative traits, which are phenotypes that vary continuously—such as height or mass—as opposed to phenotypes and gene-products that are discretely identifiable—such as eye-colour, or the presence of a particular biochemical.
Both of these branches of genetics use the frequenci... | Biology and health sciences | Genetics | Biology |
297438 | https://en.wikipedia.org/wiki/Easel | Easel | An easel is an upright support used for displaying and/or fixing something resting upon it, at an angle of about 20° to the vertical. In particular, painters traditionally use an easel to support a painting while they work on it, normally standing up; easels are also sometimes used to display finished paintings. Artis... | Technology | Artist's and drafting tools | null |
297466 | https://en.wikipedia.org/wiki/Spontaneous%20symmetry%20breaking | Spontaneous symmetry breaking | Spontaneous symmetry breaking is a spontaneous process of symmetry breaking, by which a physical system in a symmetric state spontaneously ends up in an asymmetric state. In particular, it can describe systems where the equations of motion or the Lagrangian obey symmetries, but the lowest-energy vacuum solutions do not... | Physical sciences | Particle physics: General | Physics |
297811 | https://en.wikipedia.org/wiki/Jensen%27s%20inequality | Jensen's inequality | In mathematics, Jensen's inequality, named after the Danish mathematician Johan Jensen, relates the value of a convex function of an integral to the integral of the convex function. It was proved by Jensen in 1906, building on an earlier proof of the same inequality for doubly-differentiable functions by Otto Hölder in... | Mathematics | Other algebra topics | null |
297839 | https://en.wikipedia.org/wiki/Time%20dilation | Time dilation | Time dilation is the difference in elapsed time as measured by two clocks, either because of a relative velocity between them (special relativity), or a difference in gravitational potential between their locations (general relativity). When unspecified, "time dilation" usually refers to the effect due to velocity.
Af... | Physical sciences | Theory of relativity | Physics |
297924 | https://en.wikipedia.org/wiki/Mantis%20shrimp | Mantis shrimp | Mantis shrimp are carnivorous marine crustaceans of the order Stomatopoda (). Stomatopods branched off from other members of the class Malacostraca around 400 million years ago, with more than 520 extant species of mantis shrimp known. All living species are in the suborder Unipeltata, which arose around 250 million ye... | Biology and health sciences | Malacostraca | Animals |
298223 | https://en.wikipedia.org/wiki/Glassblowing | Glassblowing | Glassblowing is a glassforming technique that involves inflating molten glass into a bubble (or parison) with the aid of a blowpipe (or blow tube). A person who blows glass is called a glassblower, glassmith, or gaffer. A lampworker (often also called a glassblower or glassworker) manipulates glass with the use of a to... | Technology | Materials | null |
298420 | https://en.wikipedia.org/wiki/Maximum%20and%20minimum | Maximum and minimum | In mathematical analysis, the maximum and minimum of a function are, respectively, the greatest and least value taken by the function. Known generically as extremum, they may be defined either within a given range (the local or relative extrema) or on the entire domain (the global or absolute extrema) of a function. Pi... | Mathematics | Functions: General | null |
298428 | https://en.wikipedia.org/wiki/Identity%20%28mathematics%29 | Identity (mathematics) | In mathematics, an identity is an equality relating one mathematical expression A to another mathematical expression B, such that A and B (which might contain some variables) produce the same value for all values of the variables within a certain domain of discourse. In other words, A = B is an identity if A and B defi... | Mathematics | Basics | null |
298448 | https://en.wikipedia.org/wiki/Cosmochemistry | Cosmochemistry | Cosmochemistry () or chemical cosmology is the study of the chemical composition of matter in the universe and the processes that led to those compositions. This is done primarily through the study of the chemical composition of meteorites and other physical samples. Given that the asteroid parent bodies of meteorites ... | Physical sciences | Astronomy basics | Astronomy |
298534 | https://en.wikipedia.org/wiki/CompactFlash | CompactFlash | CompactFlash (CF) is a flash memory mass storage device used mainly in portable electronic devices. The format was specified and the devices were first manufactured by SanDisk in 1994.
CompactFlash became one of the most successful of the early memory card formats, surpassing Miniature Card and SmartMedia. Subsequent... | Technology | Non-volatile memory | null |
298547 | https://en.wikipedia.org/wiki/Immunity%20%28medicine%29 | Immunity (medicine) | In biology, immunity is the state of being insusceptible or resistant to a noxious agent or process, especially a pathogen or infectious disease. Immunity may occur naturally or be produced by prior exposure or immunization.
Innate and adaptive
The immune system has innate and adaptive components. Innate immunity is... | Biology and health sciences | Concepts | Health |
298600 | https://en.wikipedia.org/wiki/Procaine | Procaine | Procaine is a local anesthetic drug of the amino ester group. It is most commonly used in dental procedures to numb the area around a tooth and is also used to reduce the pain of intramuscular injection of penicillin. Owing to the ubiquity of the trade name Novocain or Novocaine, in some regions, procaine is referred t... | Biology and health sciences | Anesthetics | Health |
298681 | https://en.wikipedia.org/wiki/Gondola%20lift | Gondola lift | A gondola lift is a means of cable transport and type of aerial lift which is supported and propelled by cables from above. It consists of a loop of steel wire rope that is strung between two stations, sometimes over intermediate supporting towers. The cable is driven by a bullwheel in a terminal, which is typically co... | Technology | Rail and cable transport | null |
298762 | https://en.wikipedia.org/wiki/Lidocaine | Lidocaine | Lidocaine, also known as lignocaine and sold under the brand name Xylocaine among others, is a local anesthetic of the amino amide type. It is also used to treat ventricular tachycardia and ventricular fibrillation. When used for local anaesthesia or in nerve blocks, lidocaine typically begins working within several mi... | Biology and health sciences | Anesthetics | Health |
298834 | https://en.wikipedia.org/wiki/Affine%20space | Affine space | In mathematics, an affine space is a geometric structure that generalizes some of the properties of Euclidean spaces in such a way that these are independent of the concepts of distance and measure of angles, keeping only the properties related to parallelism and ratio of lengths for parallel line segments. Affine spac... | Mathematics | Other algebra topics | null |
298931 | https://en.wikipedia.org/wiki/Jujube | Jujube | Jujube (UK ; US or ), sometimes jujuba, scientific name Ziziphus jujuba, and also called red date, Chinese date, and Chinese jujube, is a species in the genus Ziziphus in the buckthorn family Rhamnaceae. It is often confused with the closely related Indian jujube, Z.mauritiana. The Chinese jujube enjoys a diverse rang... | Biology and health sciences | Stone fruits | Plants |
299014 | https://en.wikipedia.org/wiki/Intensive%20care%20medicine | Intensive care medicine | Intensive care medicine, usually called critical care medicine, is a medical specialty that deals with seriously or critically ill patients who have, are at risk of, or are recovering from conditions that may be life-threatening. It includes providing life support, invasive monitoring techniques, resuscitation, and end... | Biology and health sciences | Fields of medicine | Health |
299462 | https://en.wikipedia.org/wiki/Remotely%20operated%20underwater%20vehicle | Remotely operated underwater vehicle | A remotely operated underwater vehicle (ROUV) or remotely operated vehicle (ROV) is a free-swimming submersible craft used to perform underwater observation, inspection and physical tasks such as valve operations, hydraulic functions and other general tasks within the subsea oil and gas industry, military, scientific a... | Technology | Naval transport | null |
299641 | https://en.wikipedia.org/wiki/Epithelium | Epithelium | Epithelium or epithelial tissue is a thin, continuous, protective layer of cells with little extracellular matrix. An example is the epidermis, the outermost layer of the skin. Epithelial (mesothelial) tissues line the outer surfaces of many internal organs, the corresponding inner surfaces of body cavities, and the in... | Biology and health sciences | Tissues | null |
2703136 | https://en.wikipedia.org/wiki/Trans-Mongolian%20Railway | Trans-Mongolian Railway | The Trans-Mongolian Railway (, ) connects Ulan-Ude on the Trans-Siberian Railway in Buryatia, Russia, with Ulanqab in Inner Mongolia, China, via Ulaanbaatar, the capital of Mongolia. It was completed in 1956, and runs from northwest to southeast with major stations at Naushki/Sükhbaatar on the Russian border, Darkhan, ... | Technology | Railway lines | null |
4962816 | https://en.wikipedia.org/wiki/Picul | Picul | A picul , dan
or tam, is a traditional Asian unit of weight, defined as "as much as a man can carry on a shoulder-pole". Historically, it was defined as equivalent to 100 or 120 catties, depending on time and region. The picul is most commonly used in southern China and Maritime Southeast Asia.
History
The unit origi... | Physical sciences | Chinese | Basics and measurement |
4963211 | https://en.wikipedia.org/wiki/Silver%20carp | Silver carp | The silver carp or silverfin (Hypophthalmichthys molitrix) is a species of freshwater cyprinid fish, a variety of Asian carp native to China and eastern Siberia, from the Amur River drainage in the north to the Xi Jiang River drainage in the south. Although a threatened species in its natural habitat, it has long been ... | Biology and health sciences | Cypriniformes | Animals |
25480850 | https://en.wikipedia.org/wiki/Dog%20flea | Dog flea | The dog flea (Ctenocephalides canis) is a species of flea that lives as an ectoparasite on a wide variety of mammals, particularly the domestic dog and cat. It closely resembles the cat flea, Ctenocephalides felis, which can live on a wider range of animals and is generally more prevalent worldwide.
The dog flea is tr... | Biology and health sciences | Insects: General | Animals |
18835541 | https://en.wikipedia.org/wiki/Narcolepsy | Narcolepsy | Narcolepsy is a chronic neurological disorder that impairs the ability to regulate sleep–wake cycles, and specifically impacts REM (rapid eye movement) sleep. The pentad symptoms of narcolepsy include excessive daytime sleepiness (EDS), sleep-related hallucinations, sleep paralysis, disturbed nocturnal sleep (DNS), and... | Biology and health sciences | Mental disorders | Health |
6520040 | https://en.wikipedia.org/wiki/Trapping | Trapping | Animal trapping, or simply trapping or ginning, is the use of a device to remotely catch and often kill an animal. Animals may be trapped for a variety of purposes, including for meat, fur/feathers, sport hunting, pest control, and wildlife management.
History
Neolithic hunters, including the members of the Cucuteni-... | Technology | Hunting and fishing | null |
860921 | https://en.wikipedia.org/wiki/Ankylosauria | Ankylosauria | Ankylosauria is a group of herbivorous dinosaurs of the clade Ornithischia. It includes the great majority of dinosaurs with armor in the form of bony osteoderms, similar to turtles. Ankylosaurs were bulky quadrupeds, with short, powerful limbs. They are known to have first appeared in North Africa during the Middle Ju... | Biology and health sciences | Ornitischians | Animals |
861683 | https://en.wikipedia.org/wiki/Nautiloid | Nautiloid | Nautiloids are a group of marine cephalopods (Mollusca) which originated in the Late Cambrian and are represented today by the living Nautilus and Allonautilus. Fossil nautiloids are diverse and species rich, with over 2,500 recorded species. They flourished during the early Paleozoic era, when they constituted the mai... | Biology and health sciences | Cephalopods | Animals |
862291 | https://en.wikipedia.org/wiki/Gastornis | Gastornis | Gastornis is an extinct genus of large, flightless birds that lived during the mid-Paleocene to mid-Eocene epochs of the Paleogene period. Most fossils have been found in Europe, and some species typically referred to the genus are known from North America and Asia. Several genera, including the well-studied genus Diat... | Biology and health sciences | Prehistoric birds | Animals |
862361 | https://en.wikipedia.org/wiki/H%C3%BCckel%27s%20rule | Hückel's rule | In organic chemistry, Hückel's rule predicts that a planar ring molecule will have aromatic properties if it has 4n + 2 π-electrons, where n is a non-negative integer. The quantum mechanical basis for its formulation was first worked out by physical chemist Erich Hückel in 1931. The succinct expression as the 4n + 2 r... | Physical sciences | Aromatic hydrocarbons | Chemistry |
862621 | https://en.wikipedia.org/wiki/Fumigation | Fumigation | Fumigation is a method of pest control or the removal of harmful microorganisms by completely filling an area with gaseous pesticides, or fumigants, to suffocate or poison the pests within. It is used to control pests in buildings (structural fumigation), soil, grain, and produce. Fumigation is also used during the pro... | Technology | Pest and disease control | null |
862627 | https://en.wikipedia.org/wiki/Cadmium%20sulfide | Cadmium sulfide | Cadmium sulfide is the inorganic compound with the formula CdS. Cadmium sulfide is a yellow salt. It occurs in nature with two different crystal structures as the rare minerals greenockite and hawleyite, but is more prevalent as an impurity substituent in the similarly structured zinc ores sphalerite and wurtzite, whic... | Physical sciences | Sulfide salts | Chemistry |
862694 | https://en.wikipedia.org/wiki/Photometer | Photometer | A photometer is an instrument that measures the strength of electromagnetic radiation in the range from ultraviolet to infrared and including the visible spectrum. Most photometers convert light into an electric current using a photoresistor, photodiode, or photomultiplier.
Photometers measure:
Illuminance
Irradiance
... | Technology | Measuring instruments | null |
862717 | https://en.wikipedia.org/wiki/Projectile%20motion | Projectile motion | Projectile motion is a form of motion experienced by an object or particle (a projectile) that is projected in a gravitational field, such as from Earth's surface, and moves along a curved path (a trajectory) under the action of gravity only. In the particular case of projectile motion on Earth, most calculations assum... | Physical sciences | Classical mechanics | Physics |
862860 | https://en.wikipedia.org/wiki/Hypochlorite | Hypochlorite | In chemistry, hypochlorite, or chloroxide is an anion with the chemical formula ClO−. It combines with a number of cations to form hypochlorite salts. Common examples include sodium hypochlorite (household bleach) and calcium hypochlorite (a component of bleaching powder, swimming pool "chlorine"). The Cl-O distance i... | Physical sciences | Halide oxyanions | Chemistry |
862898 | https://en.wikipedia.org/wiki/Absolute%20space%20and%20time | Absolute space and time | Absolute space and time is a concept in physics and philosophy about the properties of the universe. In physics, absolute space and time may be a preferred frame.
Early concept
A version of the concept of absolute space (in the sense of a preferred frame) can be seen in Aristotelian physics. Robert S. Westman writes t... | Physical sciences | Classical mechanics | Physics |
863348 | https://en.wikipedia.org/wiki/Caracas%20Metro | Caracas Metro | The Caracas Metro () is a mass rapid transit system serving Caracas, Venezuela. It was constructed and is operated by Compañía Anónima Metro de Caracas, a government-owned company that was founded in 1977 by José González-Lander who headed the project for more than thirty years since the early planning stages in the 19... | Technology | Americas | null |
26977166 | https://en.wikipedia.org/wiki/Mantis | Mantis | Mantises are an order (Mantodea) of insects that contains over 2,400 species in about 460 genera in 33 families. The largest family is the Mantidae ("mantids"). Mantises are distributed worldwide in temperate and tropical habitats. They have triangular heads with bulging eyes supported on ... | Biology and health sciences | Insects and other hexapods | null |
26978338 | https://en.wikipedia.org/wiki/Gale%E2%80%93Shapley%20algorithm | Gale–Shapley algorithm | In mathematics, economics, and computer science, the Gale–Shapley algorithm (also known as the deferred acceptance algorithm, propose-and-reject algorithm, or Boston Pool algorithm) is an algorithm for finding a solution to the stable matching problem. It is named for David Gale and Lloyd Shapley, who published it in 1... | Mathematics | Order theory | null |
1324749 | https://en.wikipedia.org/wiki/Shaving%20cream | Shaving cream | Shaving cream or shave cream is a category of cream cosmetics used for shaving preparation. The purpose of shaving cream is to soften the hair by providing lubrication.
Different types of shaving creams include aerosol shaving cream (also known as shaving foam), latherless shaving cream (also called brushless shaving... | Biology and health sciences | Hygiene products | Health |
1325294 | https://en.wikipedia.org/wiki/Wild%20goat | Wild goat | The wild goat (Capra aegagrus) is a wild goat species, inhabiting forests, shrublands and rocky areas ranging from Turkey and the Caucasus in the west to Turkmenistan, Afghanistan and Pakistan in the east. It has been listed as near threatened on the IUCN Red List and is threatened by destruction and degradation of hab... | Biology and health sciences | Bovidae | Animals |
1325869 | https://en.wikipedia.org/wiki/Pliosauroidea | Pliosauroidea | Pliosauroidea is an extinct clade of plesiosaurs, known from the earliest Jurassic to early Late Cretaceous. They are best known for the subclade Thalassophonea, which contained crocodile-like short-necked forms with large heads and massive toothed jaws, commonly known as pliosaurs. More primitive non-thalassophonean p... | Biology and health sciences | Prehistoric marine reptiles | Animals |
1325949 | https://en.wikipedia.org/wiki/Tautomer | Tautomer | In chemistry, tautomers () are structural isomers (constitutional isomers) of chemical compounds that readily interconvert. The chemical reaction interconverting the two is called tautomerization. This conversion commonly results from the relocation of a hydrogen atom within the compound. The phenomenon of tautomerizat... | Physical sciences | Substance | Chemistry |
1326107 | https://en.wikipedia.org/wiki/Steady%20state | Steady state | In systems theory, a system or a process is in a steady state if the variables (called state variables) which define the behavior of the system or the process are unchanging in time. In continuous time, this means that for those properties p of the system, the partial derivative with respect to time is zero and remains... | Physical sciences | Classical mechanics | Physics |
1326373 | https://en.wikipedia.org/wiki/Leptodactylidae | Leptodactylidae | The southern frogs form the Leptodactylidae, a name that comes from Greek meaning a bird or other animal having slender toes. They are a diverse family of frogs that most likely diverged from other hyloids during the Cretaceous. The family has undergone major taxonomic revisions in recent years, including the reclassif... | Biology and health sciences | Amphibians | null |
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