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32407 | https://en.wikipedia.org/wiki/Virgo%20%28constellation%29 | Virgo (constellation) | Virgo is one of the constellations of the zodiac. Its name is Latin for maiden, and its old astronomical symbol is . Between Leo to the west and Libra to the east, it is the second-largest constellation in the sky (after Hydra) and the largest constellation in the zodiac. The ecliptic intersects the celestial equator w... | Physical sciences | Zodiac | Astronomy |
32410 | https://en.wikipedia.org/wiki/Vehicle | Vehicle | A vehicle () is a machine designed for self-propulsion, usually to transport people, cargo, or both. The term "vehicle" typically refers to land vehicles such as human-powered vehicles (e.g. bicycles, tricycles, velomobiles), animal-powered transports (e.g. horse-drawn carriages/wagons, ox carts, dog sleds), motor vehi... | Technology | Basics_11 | null |
32416 | https://en.wikipedia.org/wiki/Valley | Valley | A valley is an elongated low area often running between hills or mountains and typically containing a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a very long period. Some valleys are formed through erosion by glacial ice. These glac... | Physical sciences | Landforms | null |
32431 | https://en.wikipedia.org/wiki/Vanadium | Vanadium | Vanadium is a chemical element; it has symbol V and atomic number 23. It is a hard, silvery-grey, malleable transition metal. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) somewhat stabilizes the free metal against further oxidation.
Spanis... | Physical sciences | Chemical elements_2 | null |
32435 | https://en.wikipedia.org/wiki/Vellum | Vellum | Vellum is prepared animal skin or membrane, typically used as writing material. It is often distinguished from parchment, either by being made from calfskin (rather than the skin of other animals), or simply by being of a higher quality. Vellum is prepared for writing and printing on single pages, scrolls, and codices ... | Technology | Materials | null |
32441 | https://en.wikipedia.org/wiki/Video | Video | Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media. Video was first developed for mechanical television systems, which were quickly replaced by cathode-ray tube (CRT) systems, which, in turn, were replaced by flat-panel displays of several types.
Video ... | Technology | Media and communication | null |
32473 | https://en.wikipedia.org/wiki/Vaccination | Vaccination | Vaccination is the administration of a vaccine to help the immune system develop immunity from a disease. Vaccines contain a microorganism or virus in a weakened, live or killed state, or proteins or toxins from the organism. In stimulating the body's adaptive immunity, they help prevent sickness from an infectious dis... | Biology and health sciences | Drugs and pharmacology | null |
32476 | https://en.wikipedia.org/wiki/Vagina | Vagina | In mammals and other animals, the vagina (: vaginas or vaginae) is the elastic, muscular reproductive organ of the female genital tract. In humans, it extends from the vulval vestibule to the cervix (neck of the uterus). The vaginal introitus is normally partly covered by a thin layer of mucosal tissue called the hymen... | Biology and health sciences | Reproductive system | null |
32478 | https://en.wikipedia.org/wiki/Vim%20%28text%20editor%29 | Vim (text editor) | Vim (; vi improved) is a free and open-source, screen-based text editor program. It is an improved clone of Bill Joy's vi. Vim's author, Bram Moolenaar, derived Vim from a port of the Stevie editor for Amiga and released a version to the public in 1991. Vim is designed for use both from a command-line interface and as ... | Technology | Office and data management | null |
32496 | https://en.wikipedia.org/wiki/Vacuum%20tube | Vacuum tube | A vacuum tube, electron tube, valve (British usage), or tube (North America) is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.
The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons ... | Technology | Components | null |
32498 | https://en.wikipedia.org/wiki/Volume | Volume | Volume is a measure of regions in three-dimensional space. It is often quantified numerically using SI derived units (such as the cubic metre and litre) or by various imperial or US customary units (such as the gallon, quart, cubic inch). The definition of length and height (cubed) is interrelated with volume. The volu... | Mathematics | Geometry and topology | null |
32500 | https://en.wikipedia.org/wiki/Vacuum%20pump | Vacuum pump | A vacuum pump is a type of pump device that draws gas particles from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded by the suction pump, which dates to antiquity.
History
Early pumps
The predecessor to the vacuum pump was t... | Technology | Hydraulics and pneumatics | null |
32502 | https://en.wikipedia.org/wiki/Vacuum | Vacuum | A vacuum (: vacuums or vacua) is space devoid of matter. The word is derived from the Latin adjective (neuter ) meaning "vacant" or "void". An approximation to such vacuum is a region with a gaseous pressure much less than atmospheric pressure. Physicists often discuss ideal test results that would occur in a perfec... | Physical sciences | Physics | null |
32505 | https://en.wikipedia.org/wiki/Vapor | Vapor | In physics, a vapor (American English) or vapour (Commonwealth English; see spelling differences) is a substance in the gas phase at a temperature lower than its critical temperature, which means that the vapor can be condensed to a liquid by increasing the pressure on it without reducing the temperature of the vapor. ... | Physical sciences | States of matter | null |
32509 | https://en.wikipedia.org/wiki/Vitamin%20C | Vitamin C | Vitamin C (also known as ascorbic acid and ascorbate) is a water-soluble vitamin found in citrus and other fruits, berries and vegetables. It is also a generic prescription medication and in some countries is sold as a non-prescription dietary supplement. As a therapy, it is used to prevent and treat scurvy, a disease ... | Biology and health sciences | Vitamins | Health |
32512 | https://en.wikipedia.org/wiki/Vitamin | Vitamin | Vitamins are organic molecules (or a set of closely related molecules called vitamers) that are essential to an organism in small quantities for proper metabolic function. Essential nutrients cannot be synthesized in the organism in sufficient quantities for survival, and therefore must be obtained through the diet. Fo... | Biology and health sciences | Health and fitness | null |
32528 | https://en.wikipedia.org/wiki/Visual%20cortex | Visual cortex | The visual cortex of the brain is the area of the cerebral cortex that processes visual information. It is located in the occipital lobe. Sensory input originating from the eyes travels through the lateral geniculate nucleus in the thalamus and then reaches the visual cortex. The area of the visual cortex that receives... | Biology and health sciences | Visual system | Biology |
32529 | https://en.wikipedia.org/wiki/Velociraptor | Velociraptor | Velociraptor (; ) is a genus of small dromaeosaurid dinosaurs that lived in Asia during the Late Cretaceous epoch, about 75 million to 71 million years ago. Two species are currently recognized, although others have been assigned in the past. The type species is V. mongoliensis, named and described in 1924. Fossils of ... | Biology and health sciences | Dinosaurs and prehistoric reptiles | null |
32533 | https://en.wikipedia.org/wiki/Euclidean%20vector | Euclidean vector | In mathematics, physics, and engineering, a Euclidean vector or simply a vector (sometimes called a geometric vector or spatial vector) is a geometric object that has magnitude (or length) and direction. Euclidean vectors can be added and scaled to form a vector space. A vector quantity is a vector-valued physical quan... | Mathematics | Algebra | null |
32541 | https://en.wikipedia.org/wiki/Vitamin%20K | Vitamin K | Vitamin K is a family of structurally similar, fat-soluble vitamers found in foods and marketed as dietary supplements. The human body requires vitamin K for post-synthesis modification of certain proteins that are required for blood coagulation ("K" from Danish koagulation, for "coagulation") or for controlling bindin... | Biology and health sciences | Vitamins | Health |
32549 | https://en.wikipedia.org/wiki/Voltage | Voltage | Voltage, also known as (electrical) potential difference, electric pressure, or electric tension is the difference in electric potential between two points. In a static electric field, it corresponds to the work needed per unit of charge to move a positive test charge from the first point to the second point. In the In... | Physical sciences | Electrostatics | Physics |
32557 | https://en.wikipedia.org/wiki/Vulture | Vulture | A vulture is a bird of prey that scavenges on carrion. There are 23 extant species of vulture (including condors). Old World vultures include 16 living species native to Europe, Africa, and Asia; New World vultures are restricted to North and South America and consist of seven identified species, all belonging to the C... | Biology and health sciences | Accipitrimorphae | Animals |
32565 | https://en.wikipedia.org/wiki/Sildenafil | Sildenafil | Sildenafil, sold under the brand name Viagra among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud's phenomenon. It is unclear if it is effective for treating sexual dysfunction... | Biology and health sciences | Specific drugs | Health |
32567 | https://en.wikipedia.org/wiki/Volt | Volt | The volt (symbol: V) is the unit of electric potential, electric potential difference (voltage), and electromotive force in the International System of Units (SI).
Definition
One volt is defined as the electric potential between two points of a conducting wire when an electric current of one ampere dissipates one wat... | Physical sciences | Electromagnetism | null |
32568 | https://en.wikipedia.org/wiki/Vela%20%28constellation%29 | Vela (constellation) | Vela is a constellation in the southern sky, which contains the Vela Supercluster. Its name is Latin for the sails of a ship, and it was originally part of a larger constellation, the ship Argo Navis, which was later divided into three parts, the others being Carina and Puppis. With an apparent magnitude of 1.8, its br... | Physical sciences | Other | Astronomy |
32571 | https://en.wikipedia.org/wiki/Volcano | Volcano | A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and because most of Eart... | Physical sciences | Earth science | null |
32572 | https://en.wikipedia.org/wiki/Vesicle%20%28biology%20and%20chemistry%29 | Vesicle (biology and chemistry) | In cell biology, a vesicle is a structure within or outside a cell, consisting of liquid or cytoplasm enclosed by a lipid bilayer. Vesicles form naturally during the processes of secretion (exocytosis), uptake (endocytosis), and the transport of materials within the plasma membrane. Alternatively, they may be prepared ... | Biology and health sciences | Organelles | Biology |
32612 | https://en.wikipedia.org/wiki/Virtual%20reality | Virtual reality | Virtual reality (VR) is a simulated experience that employs 3D near-eye displays and pose tracking to give the user an immersive feel of a virtual world. Applications of virtual reality include entertainment (particularly video games), education (such as medical, safety or military training) and business (such as virtu... | Technology | Computer science | null |
32623 | https://en.wikipedia.org/wiki/Vanilla | Vanilla | Vanilla is a spice derived from orchids of the genus Vanilla, primarily obtained from pods of the flat-leaved vanilla (V. planifolia).
Vanilla is not autogamous, so pollination is required to make the plants produce the fruit from which the vanilla spice is obtained. In 1837, Belgian botanist Charles François Antoine ... | Biology and health sciences | Monocots | null |
32640 | https://en.wikipedia.org/wiki/Vector%20calculus | Vector calculus | Vector calculus or vector analysis is a branch of mathematics concerned with the differentiation and integration of vector fields, primarily in three-dimensional Euclidean space, The term vector calculus is sometimes used as a synonym for the broader subject of multivariable calculus, which spans vector calculus as w... | Mathematics | Calculus and analysis | null |
32653 | https://en.wikipedia.org/wiki/Vaccine | Vaccine | A vaccine is a biological preparation that provides active acquired immunity to a particular infectious or malignant disease. The safety and effectiveness of vaccines has been widely studied and verified. A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakene... | Biology and health sciences | Drugs and medication | null |
32654 | https://en.wikipedia.org/wiki/Veterinary%20medicine | Veterinary medicine | Veterinary medicine is the branch of medicine that deals with the prevention, management, diagnosis, and treatment of disease, disorder, and injury in non-human animals. The scope of veterinary medicine is wide, covering all animal species, both domesticated and wild, with a wide range of conditions that can affect dif... | Biology and health sciences | General concepts | null |
32664 | https://en.wikipedia.org/wiki/Virial%20theorem | Virial theorem | In mechanics, the virial theorem provides a general equation that relates the average over time of the total kinetic energy of a stable system of discrete particles, bound by a conservative force (where the work done is independent of path), with that of the total potential energy of the system. Mathematically, the the... | Physical sciences | Basics_4 | Physics |
32712 | https://en.wikipedia.org/wiki/Vega | Vega | Vega is the brightest star in the northern constellation of Lyra. It has the Bayer designation α Lyrae, which is Latinised to Alpha Lyrae and abbreviated Alpha Lyr or α Lyr. This star is relatively close at only from the Sun, and one of the most luminous stars in the Sun's neighborhood. It is the fifth-brightest star ... | Physical sciences | Notable stars | null |
32718 | https://en.wikipedia.org/wiki/Condorcet%20paradox | Condorcet paradox | In social choice theory, Condorcet's voting paradox is a fundamental discovery by the Marquis de Condorcet that majority rule is inherently self-contradictory. The result implies that it is logically impossible for any voting system to guarantee that a winner will have support from a majority of voters: for example the... | Mathematics | Game theory | null |
32745 | https://en.wikipedia.org/wiki/Venus | Venus | Venus is the second planet from the Sun. It is a terrestrial planet and is the closest in mass and size to its orbital neighbour Earth. Venus has by far the densest atmosphere of the terrestrial planets, composed mostly of carbon dioxide with a thick, global sulfuric acid cloud cover. At the surface it has a mean tempe... | Physical sciences | Astronomy | null |
32754 | https://en.wikipedia.org/wiki/Valve | Valve | A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings, but are usually discussed as a separate category. In an open valve, fluid flow... | Technology | Components_2 | null |
32771 | https://en.wikipedia.org/wiki/Venom | Venom | Venom or zootoxin is a type of toxin produced by an animal that is actively delivered through a wound by means of a bite, sting, or similar action. The toxin is delivered through a specially evolved venom apparatus, such as fangs or a stinger, in a process called envenomation. Venom is often distinguished from poison, ... | Biology and health sciences | Animal: General | null |
32781 | https://en.wikipedia.org/wiki/Voyager%201 | Voyager 1 | Voyager 1 is a space probe launched by NASA on September 5, 1977, as part of the Voyager program to study the outer Solar System and the interstellar space beyond the Sun's heliosphere. It was launched 16 days after its twin, Voyager 2. It communicates through the NASA Deep Space Network (DSN) to receive routine comman... | Technology | Unmanned spacecraft | null |
32782 | https://en.wikipedia.org/wiki/Voyager%202 | Voyager 2 | Voyager 2 is a space probe launched by NASA on August 20, 1977, as a part of the Voyager program. It was launched on a trajectory towards the gas giants Jupiter and Saturn and enabled further encounters with the ice giants Uranus and Neptune. It remains the only spacecraft to have visited either of the ice giant planet... | Technology | Unmanned spacecraft | null |
32786 | https://en.wikipedia.org/wiki/V-2%20rocket | V-2 rocket | The V2 (), with the technical name Aggregat 4 (A4), was the world's first long-range guided ballistic missile. The missile, powered by a liquid-propellant rocket engine, was developed during the Second World War in Nazi Germany as a "vengeance weapon" and assigned to attack Allied cities as retaliation for the Allied b... | Technology | Missiles | null |
32823 | https://en.wikipedia.org/wiki/Very-large-scale%20integration | Very-large-scale integration | Very-large-scale integration (VLSI) is the process of creating an integrated circuit (IC) by combining millions or billions of MOS transistors onto a single chip. VLSI began in the 1970s when MOS integrated circuit (metal oxide semiconductor) chips were developed and then widely adopted, enabling complex semiconductor ... | Technology | Semiconductors | null |
32851 | https://en.wikipedia.org/wiki/Wiki | Wiki | A wiki ( ) is a form of hypertext publication on the internet which is collaboratively edited and managed by its audience directly through a web browser. A typical wiki contains multiple pages that can either be edited by the public or limited to use within an organization for maintaining its internal knowledge base.
... | Technology | Internet | null |
33118 | https://en.wikipedia.org/wiki/Woodworking | Woodworking | Woodworking is the skill of making items from wood, and includes cabinetry, furniture making, wood carving, joinery, carpentry, and woodturning.
History
Along with stone, clay and animal parts, wood was one of the first materials worked by early humans. Microwear analysis of the Mousterian stone tools used by the Nea... | Technology | Material and chemical | null |
33125 | https://en.wikipedia.org/wiki/Wavelength | Wavelength | In physics and mathematics, wavelength or spatial period of a wave or periodic function is the distance over which the wave's shape repeats. In other words, it is the distance between consecutive corresponding points of the same phase on the wave, such as two adjacent crests, troughs, or zero crossings. Wavelength is a... | Physical sciences | Waves | null |
33139 | https://en.wikipedia.org/wiki/World%20Wide%20Web | World Wide Web | The World Wide Web (WWW or simply the Web) is an information system that enables content sharing over the Internet through user-friendly ways meant to appeal to users beyond IT specialists and hobbyists. It allows documents and other web resources to be accessed over the Internet according to specific rules of the Hype... | Technology | Internet | null |
33173 | https://en.wikipedia.org/wiki/Web%20browser | Web browser | A web browser is an application for accessing websites. When a user requests a web page from a particular website, the browser retrieves its files from a web server and then displays the page on the user's screen. Browsers are used on a range of devices, including desktops, laptops, tablets, and smartphones. By 2020, a... | Technology | Computer software | null |
33282 | https://en.wikipedia.org/wiki/Coregonus | Coregonus | Coregonus is a diverse genus of fish in the salmon family (Salmonidae). The Coregonus species are known as whitefishes. The genus contains at least 68 described extant taxa, but the true number of species is a matter of debate. The type species of the genus is Coregonus lavaretus.
Most Coregonus species inhabit lake... | Biology and health sciences | Salmoniformes | Animals |
33303 | https://en.wikipedia.org/wiki/Wankel%20engine | Wankel engine | The Wankel engine (, ) is a type of internal combustion engine using an eccentric rotary design to convert pressure into rotating motion. The concept was proven by German engineer Felix Wankel, followed by a commercially feasible engine designed by German engineer Hanns-Dieter Paschke. The Wankel engine's rotor, which ... | Technology | Engines | null |
33306 | https://en.wikipedia.org/wiki/Water | Water | Water is an inorganic compound with the chemical formula . It is a transparent, tasteless, odorless, and nearly colorless chemical substance. It is the main constituent of Earth's hydrosphere and the fluids of all known living organisms (in which it acts as a solvent). It is vital for all known forms of life, despite n... | Physical sciences | Science and medicine | null |
33426 | https://en.wikipedia.org/wiki/Wave%E2%80%93particle%20duality | Wave–particle duality | Wave-particle duality is the concept in quantum mechanics that fundamental entities of the universe, like photons and electrons, exhibit particle or wave properties according to the experimental circumstances. It expresses the inability of the classical concepts such as particle or wave to fully describe the behavior o... | Physical sciences | Quantum mechanics | null |
18307589 | https://en.wikipedia.org/wiki/Woodlouse | Woodlouse | Woodlice are terrestrial isopods in the suborder Oniscidea. Their name is derived from being often found in old wood, and from louse, a parasitic insect, although woodlice are neither parasitic nor insects.
Woodlice evolved from marine isopods which are presumed to have colonised land in the Carboniferous, though the ... | Biology and health sciences | Crustaceans | null |
18310979 | https://en.wikipedia.org/wiki/Group%20%28stratigraphy%29 | Group (stratigraphy) | In geology, a group is a lithostratigraphic unit consisting of a series of related formations that have been classified together to form a group. Formations are the fundamental unit of stratigraphy. Groups may sometimes be combined into supergroups.
Groups are useful for showing relationships between formations, and... | Physical sciences | Stratigraphy | Earth science |
102847 | https://en.wikipedia.org/wiki/Solid-state%20physics | Solid-state physics | Solid-state physics is the study of rigid matter, or solids, through methods such as solid-state chemistry, quantum mechanics, crystallography, electromagnetism, and metallurgy. It is the largest branch of condensed matter physics. Solid-state physics studies how the large-scale properties of solid materials result fro... | Physical sciences | Basics_8 | null |
102871 | https://en.wikipedia.org/wiki/Cellular%20respiration | Cellular respiration | Cellular respiration is the process by which biological fuels are oxidized in the presence of an inorganic electron acceptor, such as oxygen, to drive the bulk production of adenosine triphosphate (ATP), which contains energy. Cellular respiration may be described as a set of metabolic reactions and processes that take... | Biology and health sciences | Cell processes | null |
102908 | https://en.wikipedia.org/wiki/System%20call | System call | In computing, a system call (commonly abbreviated to syscall) is the programmatic way in which a computer program requests a service from the operating system on which it is executed. This may include hardware-related services (for example, accessing a hard disk drive or accessing the device's camera), creation and exe... | Technology | Operating systems | null |
102959 | https://en.wikipedia.org/wiki/Substance%20abuse | Substance abuse | Substance misuse, also known as drug misuse or, in older vernacular, substance abuse, is the use of a drug in amounts or by methods that are harmful to the individual or others. It is a form of substance-related disorder. Differing definitions of drug misuse are used in public health, medical, and criminal justice cont... | Biology and health sciences | Health and fitness: General | Health |
103051 | https://en.wikipedia.org/wiki/Iapetus%20%28moon%29 | Iapetus (moon) | Iapetus () is the outermost of Saturn's large moons. With an estimated diameter of , it is the third-largest moon of Saturn and the eleventh-largest in the Solar System. Named after the Titan Iapetus, the moon was discovered in 1671 by Giovanni Domenico Cassini.
A relatively low-density body made up mostly of ice, Iap... | Physical sciences | Solar System | Astronomy |
103068 | https://en.wikipedia.org/wiki/Kimberlite | Kimberlite | Kimberlite is an igneous rock and a rare variant of peridotite. It is most commonly known to be the main host matrix for diamonds. It is named after the town of Kimberley in South Africa, where the discovery of an 83.5-carat (16.70 g) diamond called the Star of South Africa in 1869 spawned a diamond rush and led to the... | Physical sciences | Igneous rocks | Earth science |
103077 | https://en.wikipedia.org/wiki/Turbofan | Turbofan | A turbofan or fanjet is a type of airbreathing jet engine that is widely used in aircraft propulsion. The word "turbofan" is a combination of references to the preceding generation engine technology of the turbojet and the additional fan stage. It consists of a gas turbine engine which achieves mechanical energy from c... | Technology | Aircraft components | null |
103118 | https://en.wikipedia.org/wiki/Distributive%20property | Distributive property | In mathematics, the distributive property of binary operations is a generalization of the distributive law, which asserts that the equality
is always true in elementary algebra.
For example, in elementary arithmetic, one has
Therefore, one would say that multiplication distributes over addition.
This basic property ... | Mathematics | Algebra | null |
103127 | https://en.wikipedia.org/wiki/Brute-force%20search | Brute-force search | In computer science, brute-force search or exhaustive search, also known as generate and test, is a very general problem-solving technique and algorithmic paradigm that consists of systematically checking all possible candidates for whether or not each candidate satisfies the problem's statement.
A brute-force algorit... | Mathematics | Algorithms | null |
103190 | https://en.wikipedia.org/wiki/Wren | Wren | Wrens are a family, Troglodytidae, of small brown passerine birds. The family includes 96 species and is divided into 19 genera. All species are restricted to the New World except for the Eurasian wren that is widely distributed in the Old World. In Anglophone regions, the Eurasian wren is commonly known simply as the ... | Biology and health sciences | Passerida | null |
103356 | https://en.wikipedia.org/wiki/Automata%20theory | Automata theory | Automata theory is the study of abstract machines and automata, as well as the computational problems that can be solved using them. It is a theory in theoretical computer science with close connections to mathematical logic. The word automata comes from the Greek word αὐτόματος, which means "self-acting, self-willed, ... | Mathematics | Automata theory | null |
103548 | https://en.wikipedia.org/wiki/Jerboa | Jerboa | Jerboas () are the members of the family Dipodidae. They are hopping desert rodents created throughout North Africa and Asia. They tend to live in hot deserts.
When chased, jerboas can run at up to . Some species are preyed on by little owls (Athene noctua) in central Asia. Most species of jerboas have excellent heari... | Biology and health sciences | Rodents | Animals |
103915 | https://en.wikipedia.org/wiki/Tissue%20%28biology%29 | Tissue (biology) | In biology, tissue is an assembly of similar cells and their extracellular matrix from the same embryonic origin that together carry out a specific function. Tissues occupy a biological organizational level between cells and a complete organ. Accordingly, organs are formed by the functional grouping together of multipl... | Biology and health sciences | Basics_2 | null |
104444 | https://en.wikipedia.org/wiki/Dietary%20supplement | Dietary supplement | A dietary supplement is a manufactured product intended to supplement a person's diet by taking a pill, capsule, tablet, powder, or liquid. A supplement can provide nutrients either extracted from food sources, or that are synthetic (in order to increase the quantity of their consumption). The classes of nutrient compo... | Biology and health sciences | Health and fitness | null |
104790 | https://en.wikipedia.org/wiki/Integer%20partition | Integer partition | In number theory and combinatorics, a partition of a non-negative integer , also called an integer partition, is a way of writing as a sum of positive integers. Two sums that differ only in the order of their summands are considered the same partition. (If order matters, the sum becomes a composition.) For example, ... | Mathematics | Sums and products | null |
20491903 | https://en.wikipedia.org/wiki/Velocity | Velocity | Velocity is the speed in combination with the direction of motion of an object. Velocity is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of bodies.
Velocity is a physical vector quantity: both magnitude and direction are needed to define it. The scalar absolute value... | Physical sciences | Classical mechanics | null |
20494183 | https://en.wikipedia.org/wiki/Avulsion%20%28river%29 | Avulsion (river) | In sedimentary geology and fluvial geomorphology, avulsion is the rapid abandonment of a river channel and the formation of a new river channel. Avulsions occur as a result of channel slopes that are much less steep than the slope that the river could travel if it took a new course.
Deltaic and net-depositional settin... | Physical sciences | Hydrology | Earth science |
3401973 | https://en.wikipedia.org/wiki/Abelisauridae | Abelisauridae | Abelisauridae (meaning "Abel's lizards") is a family (or clade) of ceratosaurian theropod dinosaurs. Abelisaurids thrived during the Cretaceous period, on the ancient southern supercontinent of Gondwana, and today their fossil remains are found on the modern continents of Africa and South America, as well as on the Ind... | Biology and health sciences | Theropods | Animals |
3406142 | https://en.wikipedia.org/wiki/Relativity%20of%20simultaneity | Relativity of simultaneity | In physics, the relativity of simultaneity is the concept that distant simultaneity – whether two spatially separated events occur at the same time – is not absolute, but depends on the observer's reference frame. This possibility was raised by mathematician Henri Poincaré in 1900, and thereafter became a central idea ... | Physical sciences | Theory of relativity | Physics |
1791751 | https://en.wikipedia.org/wiki/Somali%20plate | Somali plate | The Somali plate is a minor tectonic plate which straddles the Equator in the Eastern Hemisphere. It is currently in the process of separating from the African plate along the East African Rift Valley. It is approximately centered on the island of Madagascar and includes about half of the east coast of Africa, from t... | Physical sciences | Tectonic plates | Earth science |
1792150 | https://en.wikipedia.org/wiki/Styracosaurus | Styracosaurus | Styracosaurus ( ; meaning "spiked lizard" from the Ancient Greek / "spike at the butt-end of a spear-shaft" and / "lizard") is an extinct genus of herbivorous ceratopsian dinosaur from the Late Cretaceous (Campanian stage) of North America. It had four to six long parietal spikes extending from its neck frill, a smalle... | Biology and health sciences | Ornitischians | Animals |
1792302 | https://en.wikipedia.org/wiki/Pachyrhinosaurus | Pachyrhinosaurus | Pachyrhinosaurus (from Ancient Greek (), thick; (), nose; and (), lizard) is an extinct genus of centrosaurine ceratopsid dinosaur from the Late Cretaceous period of North America. The first examples were discovered by Charles M. Sternberg in Alberta, Canada, in 1946, and named in 1950. Over a dozen partial skulls a... | Biology and health sciences | Ornitischians | Animals |
1792433 | https://en.wikipedia.org/wiki/Maximum%20a%20posteriori%20estimation | Maximum a posteriori estimation | An estimation procedure that is often claimed to be part of Bayesian statistics is the maximum a posteriori (MAP) estimate of an unknown quantity, that equals the mode of the posterior density with respect to some reference measure, typically the Lebesgue measure. The MAP can be used to obtain a point estimate of an un... | Mathematics | Statistics | null |
1795571 | https://en.wikipedia.org/wiki/Calling%20convention | Calling convention | In computer science, a calling convention is an implementation-level (low-level) scheme for how subroutines or functions receive parameters from their caller and how they return a result. When some code calls a function, design choices have been taken for where and how parameters are passed to that function, and where... | Technology | Software development: General | null |
1795597 | https://en.wikipedia.org/wiki/Acetone | Acetone | Acetone (2-propanone or dimethyl ketone) is an organic compound with the formula . It is the simplest and smallest ketone (). It is a colorless, highly volatile, and flammable liquid with a characteristic pungent odour, very reminiscent of the smell of pear drops.
Acetone is miscible with water and serves as an impor... | Physical sciences | Carbon–oxygen bond | null |
19321517 | https://en.wikipedia.org/wiki/Newt | Newt | A newt is a salamander in the subfamily Pleurodelinae. The terrestrial juvenile phase is called an eft. Unlike other members of the family Salamandridae, newts are semiaquatic, alternating between aquatic and terrestrial habitats. Not all aquatic salamanders are considered newts, however. More than 100 known species of... | Biology and health sciences | Amphibians | null |
2481401 | https://en.wikipedia.org/wiki/Tiangong%20space%20station | Tiangong space station | Tiangong (), officially the Tiangong space station (), is a permanently crewed space station constructed by China and operated by China Manned Space Agency. Tiangong is a modular design, with modules docked together while in low Earth orbit, between above the surface. It is China's first long-term space station, part ... | Technology | Crewed vehicles | null |
1185479 | https://en.wikipedia.org/wiki/Nerium | Nerium | Nerium oleander ( ), commonly known as oleander or rosebay, is a shrub or small tree cultivated worldwide in temperate and subtropical areas as an ornamental and landscaping plant. It is the only species currently classified in the genus Nerium, belonging to subfamily Apocynoideae of the dogbane family Apocynaceae. It ... | Biology and health sciences | Gentianales | Plants |
1185756 | https://en.wikipedia.org/wiki/Eightfold%20way%20%28physics%29 | Eightfold way (physics) | In physics, the eightfold way is an organizational scheme for a class of subatomic particles known as hadrons that led to the development of the quark model. Both the American physicist Murray Gell-Mann and the Israeli physicist Yuval Ne'eman independently and simultaneously proposed the idea in 1961.
The name comes fr... | Physical sciences | Subatomic particles: General | Physics |
1186804 | https://en.wikipedia.org/wiki/Initial%20condition | Initial condition | In mathematics and particularly in dynamic systems, an initial condition, in some contexts called a seed value, is a value of an evolving variable at some point in time designated as the initial time (typically denoted t = 0). For a system of order k (the number of time lags in discrete time, or the order of the larges... | Mathematics | Dynamical systems | null |
1187691 | https://en.wikipedia.org/wiki/Polyvinyl%20alcohol | Polyvinyl alcohol | Polyvinyl alcohol (PVOH, PVA, or PVAl) is a water-soluble synthetic polymer. It has the idealized formula [CH2CH(OH)]n. It is used in papermaking, textile warp sizing, as a thickener and emulsion stabilizer in polyvinyl acetate (PVAc) adhesive formulations, in a variety of coatings, and 3D printing. It is colourless (w... | Physical sciences | Polymers | Chemistry |
1188375 | https://en.wikipedia.org/wiki/Turing%20reduction | Turing reduction | In computability theory, a Turing reduction from a decision problem to a decision problem is an oracle machine that decides problem given an oracle for (Rogers 1967, Soare 1987). It can be understood as an algorithm that could be used to solve if it had available to it a subroutine for solving . The concept can be... | Mathematics | Computability theory | null |
15407327 | https://en.wikipedia.org/wiki/Absolute%20electrode%20potential | Absolute electrode potential | Absolute electrode potential, in electrochemistry, according to an IUPAC definition, is the electrode potential of a metal measured with respect to a universal reference system (without any additional metal–solution interface).
Definition
According to a more specific definition presented by Trasatti, the absolute elec... | Physical sciences | Electrochemistry | Chemistry |
4597674 | https://en.wikipedia.org/wiki/Photon%20epoch | Photon epoch | In physical cosmology, the photon epoch was the period in the evolution of the early universe in which photons dominated the energy of the universe. The photon epoch started after most leptons and anti-leptons were annihilated at the end of the lepton epoch, about 10 seconds after the Big Bang. Atomic nuclei were crea... | Physical sciences | Physical cosmology | Astronomy |
4598061 | https://en.wikipedia.org/wiki/Vachellia%20tortilis | Vachellia tortilis | Vachellia tortilis, widely known as Acacia tortilis but now attributed to the genus Vachellia, is the umbrella thorn acacia, also known as umbrella thorn and Israeli babool, a medium to large canopied tree native to most of Africa, primarily to the savanna and Sahel of Africa (especially the Somali peninsula and Sudan... | Biology and health sciences | Fabales | Plants |
4602964 | https://en.wikipedia.org/wiki/Vacuum%20permeability | Vacuum permeability | The vacuum magnetic permeability (variously vacuum permeability, permeability of free space, permeability of vacuum, magnetic constant) is the magnetic permeability in a classical vacuum. It is a physical constant, conventionally written as μ0 (pronounced "mu nought" or "mu zero"). It quantifies the strength of the ma... | Physical sciences | Physical constants | Physics |
6042703 | https://en.wikipedia.org/wiki/Jack%20%28device%29 | Jack (device) | A jack is a mechanical lifting device used to apply great forces or lift heavy loads. A mechanical jack employs a screw thread for lifting heavy equipment. A hydraulic jack uses hydraulic power. The most common form is a car jack, floor jack or garage jack, which lifts vehicles so that maintenance can be performed. Jac... | Technology | Tools | null |
6044675 | https://en.wikipedia.org/wiki/Faber%E2%80%93Jackson%20relation | Faber–Jackson relation | The Faber–Jackson relation provided the first empirical power-law relation between the luminosity and the central stellar velocity dispersion of elliptical galaxy, and was presented by the astronomers Sandra M. Faber and Robert Earl Jackson in 1976. Their relation can be expressed mathematically as:
with the inde... | Physical sciences | Galaxy classification | Astronomy |
731386 | https://en.wikipedia.org/wiki/Toy%20dog | Toy dog | Toy dog traditionally refers to a very small dog or a grouping of small and very small breeds of dog. A toy dog may be of any of various dog types. Types of dogs referred to as toy dogs may include spaniels, pinschers and terriers that have been bred down in size. Not all toy dogs are lap dogs.
Small dogs
Dogs foun... | Biology and health sciences | Dogs | Animals |
731780 | https://en.wikipedia.org/wiki/Geometrical%20optics | Geometrical optics | Geometrical optics, or ray optics, is a model of optics that describes light propagation in terms of rays. The ray in geometrical optics is an abstraction useful for approximating the paths along which light propagates under certain circumstances.
The simplifying assumptions of geometrical optics include that light ra... | Physical sciences | Optics | Physics |
731884 | https://en.wikipedia.org/wiki/Electromagnetic%20four-potential | Electromagnetic four-potential | An electromagnetic four-potential is a relativistic vector function from which the electromagnetic field can be derived. It combines both an electric scalar potential and a magnetic vector potential into a single four-vector.
As measured in a given frame of reference, and for a given gauge, the first component of the ... | Physical sciences | Electrodynamics | Physics |
731893 | https://en.wikipedia.org/wiki/Grey | Grey | Grey (more frequent British English) or gray (more frequent American English) is an intermediate color between black and white. It is a neutral or achromatic color, meaning that it has no chroma and therefore no hue. It is the color of a cloud-covered sky, of ash, and of lead.
The first recorded use of grey as a color... | Physical sciences | Color terms | null |
732333 | https://en.wikipedia.org/wiki/Leafy%20seadragon | Leafy seadragon | The leafy seadragon (Phycodurus eques) or Glauert's seadragon, is a marine fish. It is the only member of the genus Phycodurus in the family Syngnathidae, which includes seadragons, pipefish, and seahorses.
It is found along the southern and western coasts of Australia. The name is derived from their appearance, with ... | Biology and health sciences | Acanthomorpha | Animals |
732446 | https://en.wikipedia.org/wiki/Lorentz%20factor | Lorentz factor | The Lorentz factor or Lorentz term (also known as the gamma factor) is a dimensionless quantity expressing how much the measurements of time, length, and other physical properties change for an object while it moves. The expression appears in several equations in special relativity, and it arises in derivations of the ... | Physical sciences | Theory of relativity | Physics |
732448 | https://en.wikipedia.org/wiki/Amphotericin%20B | Amphotericin B | Amphotericin B is an antifungal medication used for serious fungal infections and leishmaniasis. The fungal infections it is used to treat include mucormycosis, aspergillosis, blastomycosis, candidiasis, coccidioidomycosis, and cryptococcosis. For certain infections it is given with flucytosine. It is typically given i... | Biology and health sciences | Antifungals | Health |
733141 | https://en.wikipedia.org/wiki/Agricultural%20economics | Agricultural economics | Agricultural economics is an applied field of economics concerned with the application of economic theory in optimizing the production and distribution of food and fiber products.
Agricultural economics began as a branch of economics that specifically dealt with land usage. It focused on maximizing the crop yield whil... | Technology | Academic disciplines | null |
733497 | https://en.wikipedia.org/wiki/Hydroxyzine | Hydroxyzine | Hydroxyzine, sold under the brand names Atarax and Vistaril among others, is an antihistamine medication. It is used in the treatment of itchiness, anxiety, insomnia, and nausea (including that due to motion sickness). It is used either by mouth or injection into a muscle.
Hydroxyzine works by blocking the effects of ... | Biology and health sciences | Antihistamines | Health |
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