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 |
|---|---|---|---|---|---|---|
82420 | https://en.wikipedia.org/wiki/Sesame | Sesame | Sesame (; Sesamum indicum) is a plant in the genus Sesamum, also called benne. Numerous wild relatives occur in Africa and a smaller number in India. It is widely naturalized in tropical regions around the world and is cultivated for its edible seeds, which grow in pods. World production in 2018 was , with Sudan, Myanm... | Biology and health sciences | Lamiales | null |
82490 | https://en.wikipedia.org/wiki/Hyades%20%28star%20cluster%29 | Hyades (star cluster) | The Hyades (; Greek Ὑάδες, also known as Caldwell 41, Collinder 50, or Melotte 25) is the nearest open cluster and one of the best-studied star clusters. Located about away from the Sun, it consists of a roughly spherical group of hundreds of stars sharing the same age, place of origin, chemical characteristics, and m... | Physical sciences | Other notable objects | null |
82518 | https://en.wikipedia.org/wiki/Hymen | Hymen | The hymen is a thin piece of mucosal tissue that surrounds or partially covers the vaginal introitus. A small percentage are born with hymens that are imperforate and completely obstruct the vaginal canal. It forms part of the vulva and is similar in structure to the vagina. The term comes straight from the Greek, for ... | Biology and health sciences | Reproductive system | Biology |
82687 | https://en.wikipedia.org/wiki/Hoag%27s%20Object | Hoag's Object | Hoag's Object is an unusual ring galaxy in the constellation of Serpens Caput. It is named after Arthur Hoag, who discovered it in 1950 and identified it as either a planetary nebula or a peculiar galaxy. The galaxy has a D25 isophotal diameter of .
Characteristics
A nearly perfect ring of young hot blue stars circles... | Physical sciences | Notable galaxies | Astronomy |
82728 | https://en.wikipedia.org/wiki/Quantum%20superposition | Quantum superposition | Quantum superposition is a fundamental principle of quantum mechanics that states that linear combinations of solutions to the Schrödinger equation are also solutions of the Schrödinger equation. This follows from the fact that the Schrödinger equation is a linear differential equation in time and position. More precis... | Physical sciences | Quantum mechanics | Physics |
82780 | https://en.wikipedia.org/wiki/Crab%20Nebula | Crab Nebula | The Crab Nebula (catalogue designations M1, NGC 1952, Taurus A) is a supernova remnant and pulsar wind nebula in the constellation of Taurus. The common name comes from a drawing that somewhat resembled a crab with arms produced by William Parsons, 3rd Earl of Rosse, in 1842 or 1843 using a telescope. The nebula was d... | Physical sciences | Notable nebulae | null |
82804 | https://en.wikipedia.org/wiki/Convergent%20evolution | Convergent evolution | Convergent evolution is the independent evolution of similar features in species of different periods or epochs in time. Convergent evolution creates analogous structures that have similar form or function but were not present in the last common ancestor of those groups. The cladistic term for the same phenomenon is ho... | Biology and health sciences | Basics_4 | Biology |
82867 | https://en.wikipedia.org/wiki/Clementine | Clementine | A clementine (Citrus × clementina) is a tangor, a citrus fruit hybrid between a willowleaf mandarin orange (C. × deliciosa) and a sweet orange (C. × sinensis), named in honor of Clément Rodier, a French missionary who first discovered and propagated the cultivar in Algeria. The exterior is a deep orange colour with a ... | Biology and health sciences | Citrus fruits | Plants |
82871 | https://en.wikipedia.org/wiki/Data%20model | Data model | A data model is an abstract model that organizes elements of data and standardizes how they relate to one another and to the properties of real-world entities. For instance, a data model may specify that the data element representing a car be composed of a number of other elements which, in turn, represent the color an... | Mathematics | Data structures and types | null |
82916 | https://en.wikipedia.org/wiki/Gear | Gear | A gear or gearwheel is a rotating machine part typically used to transmit rotational motion and/or torque by means of a series of teeth that engage with compatible teeth of another gear or other part. The teeth can be integral saliences or cavities machined on the part, or separate pegs inserted into it. In the latte... | Technology | Components_2 | null |
82926 | https://en.wikipedia.org/wiki/Floor | Floor | A floor is the bottom surface of a room or vehicle. Floors vary from simple dirt in a cave to many layered surfaces made with modern technology. Floors may be stone, wood, bamboo, metal or any other material that can support the expected load.
The levels of a building are often referred to as floors, although sometime... | Technology | Architectural elements | null |
82933 | https://en.wikipedia.org/wiki/Chloroform | Chloroform | Chloroform, or trichloromethane (often abbreviated as TCM), is an organochloride with the formula and a common solvent. It is a volatile, colorless, sweet-smelling, dense liquid produced on a large scale as a precursor to refrigerants and PTFE. Chloroform was once used as an inhalational anesthetic between the 19th ce... | Physical sciences | Halocarbons | Chemistry |
82940 | https://en.wikipedia.org/wiki/Ossicles | Ossicles | The ossicles (also called auditory ossicles) are three irregular bones in the middle ear of humans and other mammals, and are among the smallest bones in the human body. Although the term "ossicle" literally means "tiny bone" (from Latin ossiculum) and may refer to any small bone throughout the body, it typically refer... | Biology and health sciences | Sensory nervous system | Biology |
82961 | https://en.wikipedia.org/wiki/Radio%20astronomy | Radio astronomy | Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies. The first detection of radio waves from an astronomical object was in 1933, when Karl Jansky at Bell Telephone Laboratories reported radiation coming from the Milky Way. Subsequent observations have identified a number of di... | Physical sciences | Radio astronomy | Astronomy |
82974 | https://en.wikipedia.org/wiki/Post-traumatic%20stress%20disorder | Post-traumatic stress disorder | Post-traumatic stress disorder (PTSD) is a mental and behavioral disorder that develops from experiencing a traumatic event, such as sexual assault, domestic violence, child abuse, warfare and its associated traumas, natural disaster, traffic collision, or other threats on a person's life or well-being. Symptoms may in... | Biology and health sciences | Mental disorder | null |
83124 | https://en.wikipedia.org/wiki/Black%20dwarf | Black dwarf | A black dwarf is a theoretical stellar remnant, specifically a white dwarf that has cooled sufficiently to no longer emit significant heat or light. Because the time required for a white dwarf to reach this state is calculated to be longer than the current age of the universe (13.8 billion years), no black dwarfs are e... | Physical sciences | Stellar astronomy | Astronomy |
83137 | https://en.wikipedia.org/wiki/Software-defined%20radio | Software-defined radio | Software-defined radio (SDR) is a radio communication system where components that conventionally have been implemented in analog hardware (e.g. mixers, filters, amplifiers, modulators/demodulators, detectors, etc.) are instead implemented by means of software on a computer or embedded system. While the concept of SDR ... | Technology | Broadcasting | null |
11383147 | https://en.wikipedia.org/wiki/Room | Room | In a building or a ship, a room is any enclosed space within a number of walls to which entry is possible only via a door or other dividing structure. The entrance connects it to either a passageway, another room, or the outdoors. The space is typically large enough for several people to move about. The size, fixtures,... | Technology | Architectural elements | null |
9940234 | https://en.wikipedia.org/wiki/Tomato | Tomato | The tomato (, ), Solanum lycopersicum, is a plant whose fruit is an edible berry that is eaten as a vegetable. The tomato is a member of the nightshade family that includes tobacco, potato, and chili peppers. It originated from and was domesticated in western South America. It was introduced to the Old World by the Spa... | Biology and health sciences | Solanales | null |
19006979 | https://en.wikipedia.org/wiki/Mac%20%28computer%29 | Mac (computer) | Mac is a family of personal computers designed and marketed by Apple since 1984. The name is short for Macintosh (its official name until 1999), a reference to a type of apple called McIntosh. The current product lineup includes the MacBook Air and MacBook Pro laptops, and the iMac, Mac Mini, Mac Studio, and Mac Pro de... | Technology | Computer hardware | null |
19008673 | https://en.wikipedia.org/wiki/Conic%20section | Conic section | A conic section, conic or a quadratic curve is a curve obtained from a cone's surface intersecting a plane. The three types of conic section are the hyperbola, the parabola, and the ellipse; the circle is a special case of the ellipse, though it was sometimes considered a fourth type. The ancient Greek mathematicians s... | Mathematics | Geometry | null |
3261205 | https://en.wikipedia.org/wiki/Landspout | Landspout |
Landspout is a term created by atmospheric scientist Howard B. Bluestein in 1985 for a tornado not associated with a mesocyclone. The Glossary of Meteorology defines a landspout:
"Colloquial expression describing tornadoes occurring with a parent cloud in its growth stage and with its vorticity originating in the b... | Physical sciences | Storms | Earth science |
3263679 | https://en.wikipedia.org/wiki/Microgeneration | Microgeneration | Microgeneration is the small-scale production of heat or electric power from a "low carbon source," as an alternative or supplement to traditional centralized grid-connected power.
Microgeneration technologies include small-scale wind turbines, micro hydro, solar PV systems, microbial fuel cells, ground source heat pu... | Technology | Power generation | null |
3263946 | https://en.wikipedia.org/wiki/Swamphen | Swamphen | Porphyrio is the swamphen or swamp hen bird genus in the rail family. It includes some smaller species of gallinules which are sometimes separated as genus Porphyrula or united with the gallinules proper (or "moorhens") in Gallinula. The Porphyrio gallinules are distributed in the warmer regions of the world. The group... | Biology and health sciences | Gruiformes | Animals |
3264579 | https://en.wikipedia.org/wiki/Initial%20mass%20function | Initial mass function | In astronomy, the initial mass function (IMF) is an empirical function that describes the initial distribution of masses for a population of stars during star formation. IMF not only describes the formation and evolution of individual stars, it also serves as an important link that describes the formation and evolution... | Physical sciences | Stellar astronomy | Astronomy |
4428626 | https://en.wikipedia.org/wiki/Rhyniophyte | Rhyniophyte | The rhyniophytes are a group of extinct early vascular plants that are considered to be similar to the genus Rhynia, found in the Early Devonian (around ). Sources vary in the name and rank used for this group, some treating it as the class Rhyniopsida, others as the subdivision Rhyniophytina or the division Rhyniophyt... | Biology and health sciences | Pteridophytes | Plants |
4432524 | https://en.wikipedia.org/wiki/Waterborne%20disease | Waterborne disease | Waterborne diseases are conditions (meaning adverse effects on human health, such as death, disability, illness or disorders) caused by pathogenic micro-organisms that are transmitted by water. These diseases can be spread while bathing, washing, drinking water, or by eating food exposed to contaminated water. They are... | Biology and health sciences | Concepts | Health |
7682300 | https://en.wikipedia.org/wiki/Nothofagus%20fusca | Nothofagus fusca | Nothofagus fusca, commonly known as red beech (Māori: tawhai raunui) is a species of southern beech, endemic to New Zealand, occurring on both the North and South Island. It is generally found on lower hills and inland valley floors where soil is fertile and well drained. In New Zealand the species is called Fuscospora... | Biology and health sciences | Fagales | Plants |
7685074 | https://en.wikipedia.org/wiki/Chachalaca | Chachalaca | Chachalacas are galliform birds from the genus Ortalis. These birds are found in wooded habitats in the far southern United States (Texas), Mexico, and Central and South America. They are social, can be very noisy and often remain fairly common even near humans, as their relatively small size makes them less desirable ... | Biology and health sciences | Galliformes | Animals |
674489 | https://en.wikipedia.org/wiki/No-till%20farming | No-till farming | No-till farming (also known as zero tillage or direct drilling) is an agricultural technique for growing crops or pasture without disturbing the soil through tillage. No-till farming decreases the amount of soil erosion tillage causes in certain soils, especially in sandy and dry soils on sloping terrain. Other possibl... | Technology | Soil and soil management | null |
674776 | https://en.wikipedia.org/wiki/Pelvic%20floor | Pelvic floor | The pelvic floor or pelvic diaphragm is an anatomical location in the human body, which has an important role in urinary and anal continence, sexual function and support of the pelvic organs. The pelvic floor includes muscles, both skeletal and smooth, ligaments and fascia. and separates between the pelvic cavity from ... | Biology and health sciences | Human anatomy | Health |
675130 | https://en.wikipedia.org/wiki/Molecular%20physics | Molecular physics | Molecular physics is the study of the physical properties of molecules and molecular dynamics. The field overlaps significantly with physical chemistry, chemical physics, and quantum chemistry. It is often considered as a sub-field of atomic, molecular, and optical physics. Research groups studying molecular physics ar... | Physical sciences | Molecular physics | Physics |
675231 | https://en.wikipedia.org/wiki/Line%20graph | Line graph | In the mathematical discipline of graph theory, the line graph of an undirected graph is another graph that represents the adjacencies between edges of . is constructed in the following way: for each edge in , make a vertex in ; for every two edges in that have a vertex in common, make an edge between their corr... | Mathematics | Graph theory | null |
676328 | https://en.wikipedia.org/wiki/Graph%20homomorphism | Graph homomorphism | In the mathematical field of graph theory, a graph homomorphism is a mapping between two graphs that respects their structure. More concretely, it is a function between the vertex sets of two graphs that maps adjacent vertices to adjacent vertices.
Homomorphisms generalize various notions of graph colorings and allow ... | Mathematics | Graph theory | null |
676393 | https://en.wikipedia.org/wiki/Dock | Dock | The word dock () in American English refers to one or a group of human-made structures that are involved in the handling of boats or ships (usually on or near a shore). In British English, the term is not used the same way as in American English; it is used to mean the area of water that is next to or around a wharf or... | Technology | Coastal infrastructure | null |
676502 | https://en.wikipedia.org/wiki/Rogue%20wave | Rogue wave | Rogue waves (also known as freak waves or killer waves) are large and unpredictable surface waves that can be extremely dangerous to ships and isolated structures such as lighthouses. They are distinct from tsunamis, which are long wavelength waves, often almost unnoticeable in deep waters and are caused by the displac... | Physical sciences | Oceanography | Earth science |
676555 | https://en.wikipedia.org/wiki/Grand%20tourer | Grand tourer | A grand tourer (GT) is a type of car that is designed for high speed and long-distance driving with performance and luxury. The most common format is a front-engine, rear-wheel-drive two-door coupé with either a two-seat or a 2+2 arrangement. Grand tourers are often the coupé derivative of luxury saloons or sedans. Som... | Technology | Motorized road transport | null |
677191 | https://en.wikipedia.org/wiki/Differential%20%28mathematics%29 | Differential (mathematics) | In mathematics, differential refers to several related notions derived from the early days of calculus, put on a rigorous footing, such as infinitesimal differences and the derivatives of functions.
The term is used in various branches of mathematics such as calculus, differential geometry, algebraic geometry and alge... | Mathematics | Basics_2 | null |
12354211 | https://en.wikipedia.org/wiki/Corn%20harvester | Corn harvester | A corn harvester is a machine used on farms to harvest corn, stripping the stalks about one foot from the ground shooting the stalks through the header to the ground. The corn is stripped from its stalk and then moves through the header to the intake conveyor belt. From there it goes up the conveying system through a f... | Technology | Farm and garden machinery | null |
2380869 | https://en.wikipedia.org/wiki/Ferrite%20%28magnet%29 | Ferrite (magnet) | A ferrite is one of a family of iron oxide-containing magnetic ceramic materials. They are ferrimagnetic, meaning they are attracted by magnetic fields and can be magnetized to become permanent magnets. Unlike many ferromagnetic materials, most ferrites are not electrically conductive, making them useful in applicati... | Physical sciences | Ceramic compounds | Chemistry |
2381321 | https://en.wikipedia.org/wiki/Shot%20%28pellet%29 | Shot (pellet) | Shot is a collective term for small spheres or pellets, often made of lead. These have been projected from slings since ancient times and were the original projectiles for shotguns and are still fired primarily from shotguns and grenade launchers, while they are less commonly used in riot guns. Shot shells are also ava... | Technology | Ammunition | null |
19009006 | https://en.wikipedia.org/wiki/Fur | Fur | Fur is a thick growth of hair that covers the skin of almost all mammals. It consists of a combination of oily guard hair on top and thick underfur beneath. The guard hair keeps moisture from reaching the skin; the underfur acts as an insulating blanket that keeps the animal warm.
The fur of mammals has many uses: pro... | Biology and health sciences | Integumentary system | null |
19009110 | https://en.wikipedia.org/wiki/Rain | Rain | Rain is water droplets that have condensed from atmospheric water vapor and then fall under gravity. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth. It provides water for hydroelectric power plants, crop irrigation, and suitable conditions for many ty... | Physical sciences | Earth science | null |
19013767 | https://en.wikipedia.org/wiki/Medical%20diagnosis | Medical diagnosis | Medical diagnosis (abbreviated Dx, Dx, or Ds) is the process of determining which disease or condition explains a person's symptoms and signs. It is most often referred to as a diagnosis with the medical context being implicit. The information required for a diagnosis is typically collected from a history and physical ... | Biology and health sciences | Medical procedures | null |
9949565 | https://en.wikipedia.org/wiki/Medical%20microbiology | Medical microbiology | Medical microbiology, the large subset of microbiology that is applied to medicine, is a branch of medical science concerned with the prevention, diagnosis and treatment of infectious diseases. In addition, this field of science studies various clinical applications of microbes for the improvement of health. There are ... | Biology and health sciences | Fields of medicine | Health |
9951602 | https://en.wikipedia.org/wiki/Earth%20mass | Earth mass | An Earth mass (denoted as M🜨, M♁ or ME, where 🜨 and ♁ are the astronomical symbols for Earth), is a unit of mass equal to the mass of the planet Earth. The current best estimate for the mass of Earth is , with a relative uncertainty of 10−4. It is equivalent to an average density of . Using the nearest metric prefix,... | Physical sciences | Mass and weight | Basics and measurement |
9958966 | https://en.wikipedia.org/wiki/Handgun | Handgun | A handgun is a firearm designed to be usable with only one hand. It is distinguished from a long barreled gun (i.e., carbine, rifle, shotgun, submachine gun, or machine gun) which typically is intended to be held by both hands and braced against the shoulder. Handguns have shorter effective ranges compared to long guns... | Technology | Projectile weapons | null |
9959000 | https://en.wikipedia.org/wiki/Pistol | Pistol | A pistol is a type of handgun, characterised by a barrel with an integral chamber. The word "pistol" derives from the Middle French pistolet (), meaning a small gun or knife, and first appeared in the English language when early handguns were produced in Europe. In colloquial usage, the word "pistol" is often used as ... | Technology | Firearms | null |
12356743 | https://en.wikipedia.org/wiki/Bite%20angle | Bite angle | In coordination chemistry, the bite angle is the angle on a central atom between two bonds to a bidentate ligand. This ligand–metal–ligand geometric parameter is used to classify chelating ligands, including those in organometallic complexes. It is most often discussed in terms of catalysis, as changes in bite angle ca... | Physical sciences | Bond structure | Chemistry |
204658 | https://en.wikipedia.org/wiki/Coupe | Coupe | A coupe or coupé (, ) is a passenger car with a sloping or truncated rear roofline and typically with two doors.
The term coupé was first applied to horse-drawn carriages for two passengers without rear-facing seats. It comes from the French past participle of , "cut".
Some coupé cars only have two seats, while some... | Technology | Motorized road transport | null |
204680 | https://en.wikipedia.org/wiki/Four-momentum | Four-momentum | In special relativity, four-momentum (also called momentum–energy or momenergy) is the generalization of the classical three-dimensional momentum to four-dimensional spacetime. Momentum is a vector in three dimensions; similarly four-momentum is a four-vector in spacetime. The contravariant four-momentum of a particle... | Physical sciences | Theory of relativity | Physics |
204682 | https://en.wikipedia.org/wiki/Translation%20%28geometry%29 | Translation (geometry) | In Euclidean geometry, a translation is a geometric transformation that moves every point of a figure, shape or space by the same distance in a given direction. A translation can also be interpreted as the addition of a constant vector to every point, or as shifting the origin of the coordinate system. In a Euclidean s... | Mathematics | Geometry: General | null |
204762 | https://en.wikipedia.org/wiki/Vaporization | Vaporization | Vaporization (or vapo(u)risation) of an element or compound is a phase transition from the liquid phase to vapor. There are two types of vaporization: evaporation and boiling. Evaporation is a surface phenomenon, whereas boiling is a bulk phenomenon (a phenomenon in which the whole object or substance is involved in th... | Physical sciences | Phase transitions | Physics |
204924 | https://en.wikipedia.org/wiki/Stone-curlew | Stone-curlew | The stone-curlews, also known as dikkops or thick-knees, consist of 10 species within the family Burhinidae, and are found throughout the tropical and temperate parts of the world, with two or more species occurring in some areas of Africa, Asia, and Australia. Despite the group being classified as waders, most species... | Biology and health sciences | Charadriiformes | Animals |
204967 | https://en.wikipedia.org/wiki/Regolith | Regolith | Regolith () is a blanket of unconsolidated, loose, heterogeneous superficial deposits covering solid rock. It includes dust, broken rocks, and other related materials and is present on Earth, the Moon, Mars, some asteroids, and other terrestrial planets and moons.
Etymology
The term regolith combines two Greek words: ... | Physical sciences | Sedimentology | Earth science |
204994 | https://en.wikipedia.org/wiki/Wisteria | Wisteria | Wisteria is a genus of flowering plants in the legume family, Fabaceae (Leguminosae). The genus includes four species of woody twining vines that are native to China, Japan, Korea, Vietnam, southern Canada, the Eastern United States, and north of Iran. They were later introduced to France, Germany and various other cou... | Biology and health sciences | Fabales | Plants |
204996 | https://en.wikipedia.org/wiki/Medulla%20oblongata | Medulla oblongata | The medulla oblongata or simply medulla is a long stem-like structure which makes up the lower part of the brainstem. It is anterior and partially inferior to the cerebellum. It is a cone-shaped neuronal mass responsible for autonomic (involuntary) functions, ranging from vomiting to sneezing. The medulla contains the ... | Biology and health sciences | Nervous system | Biology |
205012 | https://en.wikipedia.org/wiki/Sewerage | Sewerage | Sewerage (or sewage system) is the infrastructure that conveys sewage or surface runoff (stormwater, meltwater, rainwater) using sewers. It encompasses components such as receiving drains, manholes, pumping stations, storm overflows, and screening chambers of the combined sewer or sanitary sewer. Sewerage ends at the e... | Technology | Food, water and health | null |
205140 | https://en.wikipedia.org/wiki/Sandpiper | Sandpiper | Scolopacidae is a large family of shorebirds, or waders, which mainly includes many species known as sandpipers, but also others such as woodcocks, curlews and snipes. Most of these species eat small invertebrates picked out of the mud or soil. Different lengths of bills enable multiple species to feed in the same habi... | Biology and health sciences | Charadriiformes | null |
205156 | https://en.wikipedia.org/wiki/Dysgeusia | Dysgeusia | Dysgeusia, also known as parageusia, is a distortion of the sense of taste. Dysgeusia is also often associated with ageusia, which is the complete lack of taste, and hypogeusia, which is a decrease in taste sensitivity. An alteration in taste or smell may be a secondary process in various disease states, or it may be t... | Biology and health sciences | Symptoms and signs | Health |
205264 | https://en.wikipedia.org/wiki/Internal%20medicine | Internal medicine | Internal medicine, also known as general medicine in Commonwealth nations, is a medical specialty for medical doctors focused on the prevention, diagnosis, and treatment of internal diseases in adults. Medical practitioners of internal medicine are referred to as internists, or physicians in Commonwealth nations. Inter... | Biology and health sciences | Fields of medicine | Health |
205326 | https://en.wikipedia.org/wiki/Kookaburra | Kookaburra | Kookaburras (pronounced ) are terrestrial tree kingfishers of the genus Dacelo native to Australia and New Guinea, which grow to between in length and weigh around . The name is a loanword from Wiradjuri guuguubarra, onomatopoeic of its call. The loud, distinctive call of the laughing kookaburra is widely used as a st... | Biology and health sciences | Coraciiformes | Animals |
205372 | https://en.wikipedia.org/wiki/Hamerkop | Hamerkop | The hamerkop (Scopus umbretta) is a medium-sized wading bird. It is the only living species in the genus Scopus and the family Scopidae. The species and family was long thought to sit with the Ciconiiformes but is now placed with the Pelecaniformes, and its closest relatives are thought to be the pelicans and the shoe... | Biology and health sciences | Pelecanimorphae | Animals |
205406 | https://en.wikipedia.org/wiki/Microgram | Microgram | In the metric system, a microgram or microgramme is a unit of mass equal to one millionth () of a gram. The unit symbol is μg according to the International System of Units (SI); the recommended symbol in the United States and United Kingdom when communicating medical information is mcg. In μg, the prefix symbol for m... | Physical sciences | Mass and weight | Basics and measurement |
205592 | https://en.wikipedia.org/wiki/Highway%20engineering | Highway engineering | Highway engineering (also known as roadway engineering and street engineering) is a professional engineering discipline branching from the civil engineering subdiscipline of transportation engineering that involves the planning, design, construction, operation, and maintenance of roads, highways, streets, bridges, and ... | Technology | Disciplines | null |
205624 | https://en.wikipedia.org/wiki/Horizontal%20gene%20transfer | Horizontal gene transfer | Horizontal gene transfer (HGT) or lateral gene transfer (LGT) is the movement of genetic material between organisms other than by the ("vertical") transmission of DNA from parent to offspring (reproduction). HGT is an important factor in the evolution of many organisms. HGT is influencing scientific understanding of h... | Biology and health sciences | Genetics | Biology |
205710 | https://en.wikipedia.org/wiki/Achernar | Achernar | Achernar is the brightest star in the constellation of Eridanus and the ninth-brightest in the night sky. It has the Bayer designation Alpha Eridani, which is Latinized from α Eridani and abbreviated Alpha Eri or α Eri. The name Achernar applies to the primary component of a binary system. The two components are design... | Physical sciences | Notable stars | Astronomy |
205716 | https://en.wikipedia.org/wiki/Secretarybird | Secretarybird | The secretarybird or secretary bird (Sagittarius serpentarius) is a large bird of prey that is endemic to Africa. It is mostly terrestrial, spending most of its time on the ground, and is usually found in the open grasslands and savanna of the sub-Saharan region. John Frederick Miller described the species in 1779. A m... | Biology and health sciences | Accipitriformes and Falconiformes | null |
205718 | https://en.wikipedia.org/wiki/Mimosa%20%28star%29 | Mimosa (star) | Mimosa is the second-brightest object in the southern constellation of Crux (after Acrux), and the 20th-brightest star in the night sky. It has the Bayer designation β Crucis, which is Latinised to Beta Crucis and abbreviated Beta Cru or β Cru. Mimosa forms part of the prominent asterism called the Southern Cross. It i... | Physical sciences | Notable stars | Astronomy |
205719 | https://en.wikipedia.org/wiki/Beta%20Centauri | Beta Centauri | Beta Centauri is a triple star system in the southern constellation of Centaurus. It is officially called Hadar (). The Bayer designation of Beta Centauri is Latinised from β Centauri, and abbreviated Beta Cen or β Cen. The system's combined apparent visual magnitude of 0.61 makes it the second-brightest object in Cent... | Physical sciences | Notable stars | Astronomy |
205721 | https://en.wikipedia.org/wiki/Regulus | Regulus | Regulus is the brightest object in the constellation Leo and one of the brightest stars in the night sky. It has the Bayer designation designated α Leonis, which is Latinized to Alpha Leonis, and abbreviated Alpha Leo or α Leo. Regulus appears singular, but is actually a quadruple star system composed of four stars tha... | Physical sciences | Notable stars | Astronomy |
205742 | https://en.wikipedia.org/wiki/Glaucophyte | Glaucophyte | The glaucophytes, also known as glaucocystophytes or glaucocystids, are a small group of unicellular algae found in freshwater and moist terrestrial environments, less common today than they were during the Proterozoic. The stated number of species in the group varies from about 14 to 26. Together with the red algae (R... | Biology and health sciences | Bikonts | Plants |
206018 | https://en.wikipedia.org/wiki/Weather%20station | Weather station | A weather station is a facility, either on land or sea, with instruments and equipment for measuring atmospheric conditions to provide information for weather forecasts and to study the weather and climate. The measurements taken include temperature, atmospheric pressure, humidity, wind speed, wind direction, and preci... | Physical sciences | Meteorology: General | Earth science |
206064 | https://en.wikipedia.org/wiki/Van%20der%20Waals%20equation | Van der Waals equation | The van der Waals equation is a mathematical formula that describes the behavior of real gases. It is named after Dutch physicist Johannes Diderik van der Waals. It is an equation of state that relates the pressure, temperature, and molar volume in a fluid. However, it can be written in terms of other, equivalent, prop... | Physical sciences | Thermodynamics | Physics |
206115 | https://en.wikipedia.org/wiki/Schwarzschild%20radius | Schwarzschild radius | The Schwarzschild radius or the gravitational radius is a physical parameter in the Schwarzschild solution to Einstein's field equations that corresponds to the radius defining the event horizon of a Schwarzschild black hole. It is a characteristic radius associated with any quantity of mass. The Schwarzschild radius w... | Physical sciences | Basics_2 | Astronomy |
206119 | https://en.wikipedia.org/wiki/Night | Night | Night, or nighttime, is the period of darkness when the Sun is below the horizon. The opposite of nighttime is daytime. Sunlight illuminates one side of the Earth, leaving the other in darkness. Earth's rotation causes the appearance of sunrise and sunset. Moonlight, airglow, starlight, and light pollution dimly illumi... | Physical sciences | Celestial mechanics | null |
206122 | https://en.wikipedia.org/wiki/Big%20Crunch | Big Crunch | The Big Crunch is a hypothetical scenario for the ultimate fate of the universe, in which the expansion of the universe eventually reverses and the universe recollapses, ultimately causing the cosmic scale factor to reach absolute zero, an event potentially followed by a reformation of the universe starting with anothe... | Physical sciences | Physical cosmology | Astronomy |
206230 | https://en.wikipedia.org/wiki/Coonhound | Coonhound | A coonhound, colloquially a coon dog, is a type of scenthound, a member of the hound group. They are an American type of hunting dog developed for the hunting of raccoons and also for feral pigs, bobcats, cougars, and bears. There are six distinct breeds of coonhound.
History
In the colonial period, hounds were import... | Biology and health sciences | Dogs | Animals |
206242 | https://en.wikipedia.org/wiki/Differential%20%28mechanical%20device%29 | Differential (mechanical device) | A differential is a gear train with three drive shafts that has the property that the rotational speed of one shaft is the average of the speeds of the others. A common use of differentials is in motor vehicles, to allow the wheels at each end of a drive axle to rotate at different speeds while cornering. Other uses in... | Technology | Mechanisms | null |
206410 | https://en.wikipedia.org/wiki/Rail%20%28bird%29 | Rail (bird) | Rails (avian family Rallidae) are a large, cosmopolitan family of small- to medium-sized terrestrial and/or semi-amphibious birds. The family exhibits considerable diversity in its forms, and includes such ubiquitous species as the crakes, coots, and gallinule; other rail species are extremely rare or endangered. Many ... | Biology and health sciences | Gruiformes | null |
206491 | https://en.wikipedia.org/wiki/Bustard | Bustard | Bustards, including floricans and korhaans, are large, terrestrial birds living mainly in dry grassland areas and in steppe regions. They range in length from . They make up the family Otididae (, formerly known as Otidae).
Bustards are omnivorous and opportunistic, eating leaves, buds, seeds, fruit, small vertebrates... | Biology and health sciences | Gruiformes | null |
206520 | https://en.wikipedia.org/wiki/Pyroclastic%20flow | Pyroclastic flow | A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of but is capable of reaching speeds up to . The gases and tephra can reach te... | Physical sciences | Volcanology | Earth science |
206542 | https://en.wikipedia.org/wiki/Astronomical%20object | Astronomical object | An astronomical object, celestial object, stellar object or heavenly body is a naturally occurring physical entity, association, or structure that exists within the observable universe. In astronomy, the terms object and body are often used interchangeably. However, an astronomical body or celestial body is a single, t... | Physical sciences | Basics_2 | null |
206555 | https://en.wikipedia.org/wiki/Solar%20cycle | Solar cycle | The Solar cycle, also known as the solar magnetic activity cycle, sunspot cycle, or Schwabe cycle, is a periodic 11-year change in the Sun's activity measured in terms of variations in the number of observed sunspots on the Sun's surface. Over the period of a solar cycle, levels of solar radiation and ejection of solar... | Physical sciences | Solar System | Astronomy |
206586 | https://en.wikipedia.org/wiki/Technological%20convergence | Technological convergence | Technological convergence is the tendency for technologies that were originally unrelated to become more closely integrated and even unified as they develop and advance. For example, watches, telephones, television, computers, and social media platforms began as separate and mostly unrelated technologies, but have conv... | Technology | General | null |
206897 | https://en.wikipedia.org/wiki/Photographic%20plate | Photographic plate | Photographic plates preceded photographic film as a capture medium in photography. The light-sensitive emulsion of silver salts was coated on a glass plate, typically thinner than common window glass. They were heavily used in the late 19th century. With the spread of photographic film, the use of plates declined throu... | Technology | Photography | null |
206919 | https://en.wikipedia.org/wiki/Seyfert%20galaxy | Seyfert galaxy | Seyfert galaxies are one of the two largest groups of active galaxies, along with quasar host galaxies. They have quasar-like nuclei (very luminous sources of electromagnetic radiation that are outside of our own galaxy) with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, bu... | Physical sciences | Active galactic nucleus | null |
206940 | https://en.wikipedia.org/wiki/Ice%20storm | Ice storm | An ice storm, also known as a glaze event or a silver storm, is a type of winter storm characterized by freezing rain. The U.S. National Weather Service defines an ice storm as a storm which results in the accumulation of at least of ice on exposed surfaces. They are generally not violent storms but instead are commo... | Physical sciences | Storms | Earth science |
206947 | https://en.wikipedia.org/wiki/H%20II%20region | H II region | An H II region or HII region is a region of interstellar atomic hydrogen that is ionized. It is typically in a molecular cloud of partially ionized gas in which star formation has recently taken place, with a size ranging from one to hundreds of light years, and density from a few to about a million particles per cubic... | Physical sciences | Basics_3 | null |
206953 | https://en.wikipedia.org/wiki/Sandgrouse | Sandgrouse | Sandgrouse is the common name for Pteroclidae , a family of sixteen species of bird, members of the order Pterocliformes . They are traditionally placed in two genera. The two central Asian species are classified as Syrrhaptes and the other fourteen species, from Africa and Asia, are placed in the genus Pterocles. They... | Biology and health sciences | Columbimorphae | Animals |
206964 | https://en.wikipedia.org/wiki/Homing%20pigeon | Homing pigeon | The homing pigeon is a variety of domestic pigeon (Columba livia domestica), selectively bred for its ability to find its way home over extremely long distances. Because of this skill, homing pigeons were used to carry messages, a practice referred to as "pigeon post". Until the introduction of telephones, they were us... | Biology and health sciences | Pigeons | Animals |
206979 | https://en.wikipedia.org/wiki/Colorectal%20cancer | Colorectal cancer | Colorectal cancer (CRC), also known as bowel cancer, colon cancer, or rectal cancer, is the development of cancer from the colon or rectum (parts of the large intestine). Signs and symptoms may include blood in the stool, a change in bowel movements, weight loss, abdominal pain and fatigue. Most colorectal cancers are ... | Biology and health sciences | Cancer | null |
207036 | https://en.wikipedia.org/wiki/Copepod | Copepod | Copepods (; meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat. Some species are planktonic (living in the water column), some are benthic (living on the sediments), several species have parasitic phases, and some continental species may live in limnoterrestrial ... | Biology and health sciences | Crustaceans | Animals |
207040 | https://en.wikipedia.org/wiki/First%20aid%20kit | First aid kit | A first aid kit or medical kit is a collection of supplies and equipment used to give immediate medical treatment, primarily to treat injuries and other mild or moderate medical conditions. There is a wide variation in the contents of first aid kits based on the knowledge and experience of those putting it together, th... | Biology and health sciences | General concepts | Health |
207249 | https://en.wikipedia.org/wiki/Cuckoo | Cuckoo | Cuckoos are birds in the Cuculidae ( ) family, the sole taxon in the order Cuculiformes ( ). The cuckoo family includes the common or European cuckoo, roadrunners, koels, malkohas, couas, coucals, and anis. The coucals and anis are sometimes separated as distinct families, the Centropodidae and Crotophagidae, respectiv... | Biology and health sciences | Cuculiformes | null |
207277 | https://en.wikipedia.org/wiki/Common%20cuckoo | Common cuckoo | The cuckoo, common cuckoo, European cuckoo or Eurasian cuckoo (Cuculus canorus) is a member of the cuckoo order of birds, Cuculiformes, which includes the roadrunners, the anis and the coucals.
This species is a widespread summer migrant to Europe and Asia, and winters in Africa. It is a brood parasite, which means it... | Biology and health sciences | Cuculiformes and relatives | Animals |
207336 | https://en.wikipedia.org/wiki/Salivary%20gland | Salivary gland | The salivary glands in many vertebrates including mammals are exocrine glands that produce saliva through a system of ducts. Humans have three paired major salivary glands (parotid, submandibular, and sublingual), as well as hundreds of minor salivary glands. Salivary glands can be classified as serous, mucous, or sero... | Biology and health sciences | Gastrointestinal tract | Biology |
207397 | https://en.wikipedia.org/wiki/Blue%20straggler | Blue straggler | A blue straggler is a type of star that is more luminous and bluer than expected. Typically identified in a stellar cluster, they have a higher effective temperature than the main sequence turnoff point for the cluster, where ordinary stars begin to evolve towards the red giant branch. Blue stragglers were first disco... | Physical sciences | Stellar astronomy | Astronomy |
19019270 | https://en.wikipedia.org/wiki/Sexually%20transmitted%20infection | Sexually transmitted infection | A sexually transmitted infection (STI), also referred to as a sexually transmitted disease (STD) and the older term venereal disease (VD), is an infection that is spread by sexual activity, especially vaginal intercourse, anal sex, oral sex, or sometimes manual sex. STIs often do not initially cause symptoms, which res... | Biology and health sciences | Illness and injury | null |
1705831 | https://en.wikipedia.org/wiki/Earth%27s%20crust | Earth's crust | Earth's crust is its thick outer shell of rock, referring to less than one percent of the planet's radius and volume. It is the top component of the lithosphere, a solidified division of Earth's layers that includes the crust and the upper part of the mantle. The lithosphere is broken into tectonic plates whose motion ... | Physical sciences | Geology: General | Earth science |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.