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 |
|---|---|---|---|---|---|---|
375313 | https://en.wikipedia.org/wiki/Rice%20cooker | Rice cooker | A rice cooker or rice steamer is an automated kitchen appliance designed to boil or steam rice. It consists of a heat source, a cooking bowl, and a thermostat. The thermostat measures the temperature of the cooking bowl and controls the heat. Complex, high-tech rice cookers may have more sensors and other components, a... | Technology | Household appliances | null |
375416 | https://en.wikipedia.org/wiki/Computer%20simulation | Computer simulation | Computer simulation is the running of a mathematical model on a computer, the model being designed to represent the behaviour of, or the outcome of, a real-world or physical system. The reliability of some mathematical models can be determined by comparing their results to the real-world outcomes they aim to predict. C... | Technology | Computer science | null |
375743 | https://en.wikipedia.org/wiki/Environmental%20protection | Environmental protection | Environmental protection, or environment protection, is the practice of protecting the natural environment by individuals, groups and governments. Its objectives are to conserve natural resources and the existing natural environment and, where it is possible, to repair damage and reverse trends.
Due to the pressures o... | Physical sciences | Earth science basics: General | Earth science |
375767 | https://en.wikipedia.org/wiki/Semi-automatic%20firearm | Semi-automatic firearm | A semi-automatic firearm, also called a self-loading or autoloading firearm (fully automatic and selective fire firearms are also variations on self-loading firearms), is a repeating firearm whose action mechanism automatically loads a following round of cartridge into the chamber and prepares it for subsequent firing,... | Technology | Mechanisms_2 | null |
375826 | https://en.wikipedia.org/wiki/Mohorovi%C4%8Di%C4%87%20discontinuity | Mohorovičić discontinuity | The Mohorovičić discontinuity ( ; )usually called the Moho discontinuity, Moho boundary, or just Mohois the boundary between the crust and the mantle of Earth. It is defined by the distinct change in velocity of seismic waves as they pass through changing densities of rock.
The Moho lies almost entirely within the lit... | Physical sciences | Geology: General | Earth science |
13784601 | https://en.wikipedia.org/wiki/Service%20animal | Service animal | Service animals are working animals that have been trained to perform tasks that assist disabled people. Service animals may also be referred to as assistance animals or helper animals depending on the country and the animal's function. Dogs are the most common service animals, having assisted people since at least 1... | Technology | Agriculture, labor and economy | null |
13785655 | https://en.wikipedia.org/wiki/Magnetic%20anomaly | Magnetic anomaly | In geophysics, a magnetic anomaly is a local variation in the Earth's magnetic field resulting from variations in the chemistry or magnetism of the rocks. Mapping of variation over an area is valuable in detecting structures obscured by overlying material. The magnetic variation (geomagnetic reversals) in successive ba... | Physical sciences | Geophysics | Earth science |
5767923 | https://en.wikipedia.org/wiki/Ext4 | Ext4 | ext4 (fourth extended filesystem) is a journaling file system for Linux, developed as the successor to ext3.
ext4 was initially a series of backward-compatible extensions to ext3, many of them originally developed by Cluster File Systems for the Lustre file system between 2003 and 2006, meant to extend storage limits ... | Technology | Data storage and memory | null |
5772237 | https://en.wikipedia.org/wiki/Tetrasodium%20EDTA | Tetrasodium EDTA | Tetrasodium EDTA is the salt resulting from the neutralization of ethylenediaminetetraacetic acid with four equivalents of sodium hydroxide (or an equivalent sodium base). It is a white solid that is highly soluble in water. Commercial samples are often hydrated, e.g. Na4EDTA.4H2O. The properties of solutions produc... | Physical sciences | Organic salts | Chemistry |
9052243 | https://en.wikipedia.org/wiki/Sea%20krait | Sea krait | Sea kraits are a genus of venomous snakes (subfamily: Laticaudinae), Laticauda. They are semiaquatic, and retain the wide ventral scales typical of terrestrial snakes for moving on land, but also have paddle-shaped tails for swimming. Unlike fully aquatic ovoviviparous sea snakes, sea kraits are oviparous and must come... | Biology and health sciences | Snakes | Animals |
17737260 | https://en.wikipedia.org/wiki/%CE%9413C | Δ13C | {{DISPLAYTITLE:δ13C}}
In geochemistry, paleoclimatology, and paleoceanography δ13C (pronounced "delta thirteen c") is an isotopic signature, a measure of the ratio of the two stable isotopes of carbon—13C and 12C—reported in parts per thousand (per mil, ‰). The measure is also widely used in archaeology for the recons... | Physical sciences | Geochemistry | Earth science |
2311964 | https://en.wikipedia.org/wiki/Perentie | Perentie | The perentie (Varanus giganteus) is a species of monitor lizard. It is one of the largest living lizards on earth, after the Komodo dragon, Asian water monitor, and the Crocodile monitor. Found west of the Great Dividing Range in the arid areas of Australia, it is rarely seen, because of its shyness and the remoteness ... | Biology and health sciences | Lizards and other Squamata | Animals |
12189877 | https://en.wikipedia.org/wiki/Cupressus%20gigantea | Cupressus gigantea | Cupressus gigantea, the Tibetan cypress, is a species of conifer in the family Cupressaceae in Asia. C. gigantea was previously classified as a subspecies of Cupressus torulosa because of their similar morphological characteristics and close distribution, but have since been genetically distinguished as separate specie... | Biology and health sciences | Cupressaceae | Plants |
7527410 | https://en.wikipedia.org/wiki/Satellite%20television | Satellite television | Satellite television is a service that delivers television programming to viewers by relaying it from a communications satellite orbiting the Earth directly to the viewer's location. The signals are received via an outdoor parabolic antenna commonly referred to as a satellite dish and a low-noise block downconverter.
... | Technology | Media and communication | null |
4342970 | https://en.wikipedia.org/wiki/Surface%20%28mathematics%29 | Surface (mathematics) | In mathematics, a surface is a mathematical model of the common concept of a surface. It is a generalization of a plane, but, unlike a plane, it may be curved; this is analogous to a curve generalizing a straight line.
There are several more precise definitions, depending on the context and the mathematical tools tha... | Mathematics | Three-dimensional space | null |
1082841 | https://en.wikipedia.org/wiki/Fictitious%20force | Fictitious force | A fictitious force is a force that appears to act on a mass whose motion is described using a non-inertial frame of reference, such as a linearly accelerating or rotating reference frame.
Fictitious forces are invoked to maintain the validity and thus use of Newton's second law of motion, in frames of reference which a... | Physical sciences | Classical mechanics | Physics |
1084219 | https://en.wikipedia.org/wiki/Gravimetry | Gravimetry | Gravimetry is the measurement of the strength of a gravitational field. Gravimetry may be used when either the magnitude of a gravitational field or the properties of matter responsible for its creation are of interest. The study of gravity changes belongs to geodynamics.
Units of measurement
Gravity is usually measur... | Physical sciences | Geophysics | Earth science |
1085308 | https://en.wikipedia.org/wiki/Candlepower | Candlepower | Candlepower (abbreviated as cp or CP) is a unit of measurement for luminous intensity. It expresses levels of light intensity relative to the light emitted by a candle of specific size and constituents. The historical candlepower is equal to 0.981 candelas. In modern usage, candlepower is sometimes used as a synonym fo... | Physical sciences | Luminous intensity | Basics and measurement |
1085343 | https://en.wikipedia.org/wiki/Semi-empirical%20mass%20formula | Semi-empirical mass formula | In nuclear physics, the semi-empirical mass formula (SEMF) (sometimes also called the Weizsäcker formula, Bethe–Weizsäcker formula, or Bethe–Weizsäcker mass formula to distinguish it from the Bethe–Weizsäcker process) is used to approximate the mass of an atomic nucleus from its number of protons and neutrons. As the n... | Physical sciences | Nuclear physics | Physics |
1086573 | https://en.wikipedia.org/wiki/Ostracoderm | Ostracoderm | Ostracoderms () are the armored jawless fish of the Paleozoic Era. The term does not often appear in classifications today because it is paraphyletic (excluding jawed fishes and possibly the cyclostomes if anaspids are closer to them) and thus does not correspond to one evolutionary lineage. However, the term is still ... | Biology and health sciences | Agnatha | null |
1087031 | https://en.wikipedia.org/wiki/Gerenuk | Gerenuk | The gerenuk (Litocranius walleri), also known as the giraffe gazelle, is a long-necked, medium-sized antelope found in parts of East Africa. The sole member of the genus Litocranius, the gerenuk was first described by the naturalist Victor Brooke in 1879. It is characterised by its long, slender neck and limbs. The ant... | Biology and health sciences | Bovidae | Animals |
3186459 | https://en.wikipedia.org/wiki/Hypertensive%20heart%20disease | Hypertensive heart disease | Hypertensive heart disease includes a number of complications of high blood pressure that affect the heart. While there are several definitions of hypertensive heart disease in the medical literature, the term is most widely used in the context of the International Classification of Diseases (ICD) coding categories. Th... | Biology and health sciences | Cardiovascular disease | Health |
3187689 | https://en.wikipedia.org/wiki/Detritus | Detritus | In biology, detritus ( or ) is organic matter made up of the decomposing remains of organisms and plants, and also of feces. Detritus usually hosts communities of microorganisms that colonize and decompose (remineralise) it. Such microorganisms may be decomposers, detritivores, or coprophages.
In terrestrial ecosyste... | Physical sciences | Soil science | Earth science |
13794597 | https://en.wikipedia.org/wiki/Service%20%28motor%20vehicle%29 | Service (motor vehicle) | A motor vehicle service or tune-up is a series of maintenance procedures carried out at a set time interval or after the vehicle has traveled a certain distance. The service intervals are specified by the vehicle manufacturer in a service schedule and some modern cars display the due date for the next service electroni... | Technology | Concepts of ground transport | null |
1655082 | https://en.wikipedia.org/wiki/Moons%20of%20Mars | Moons of Mars | The two moons of Mars are Phobos and Deimos. They are irregular in shape. Both were discovered by American astronomer Asaph Hall in August 1877 and are named after the Greek mythological twin characters Phobos (fear and panic) and Deimos (terror and dread) who accompanied their father Ares (Mars in Roman mythology, hen... | Physical sciences | Solar System | Astronomy |
1655191 | https://en.wikipedia.org/wiki/Task%20%28computing%29 | Task (computing) | In computing, a task is a unit of execution or a unit of work. The term is ambiguous; precise alternative terms include process, light-weight process, thread (for execution), step, request, or query (for work). In the adjacent diagram, there are queues of incoming work to do and outgoing completed work, and a thread po... | Technology | Operating systems | null |
1655200 | https://en.wikipedia.org/wiki/Shading%20language | Shading language | A shading language is a graphics programming language adapted to programming shader effects. Shading languages usually consist of special data types like "vector", "matrix", "color" and "normal".
Offline rendering
Shading languages used in offline rendering tend to be close to natural language, so that no special kno... | Technology | Programming languages | null |
1656748 | https://en.wikipedia.org/wiki/Family%20medicine | Family medicine | Family medicine is a medical specialty within primary care that provides continuing and comprehensive health care for the individual and family across all ages, genders, diseases, and parts of the body. The specialist, who is usually a primary care physician, is named a family physician. It is often referred to as gene... | Biology and health sciences | Fields of medicine | Health |
5777711 | https://en.wikipedia.org/wiki/Rift%20lake | Rift lake | A rift lake is a lake formed as a result of subsidence related to movement on faults within a rift zone, an area of extensional tectonics in the continental crust. They are often found within rift valleys and may be very deep. Rift lakes may be bounded by large steep cliffs along the fault margins.
Examples
Lake Bai... | Physical sciences | Hydrology | Earth science |
5779164 | https://en.wikipedia.org/wiki/Hand%20spinning | Hand spinning | Spinning is an ancient textile art in which plant, animal or synthetic fibres are drawn out and twisted together to form yarn. For thousands of years, fibre was spun by hand using simple tools, the spindle and distaff. After the introduction of the spinning wheel in the 13th century, the output of individual spinners i... | Technology | Techniques_2 | null |
5781408 | https://en.wikipedia.org/wiki/Sociality | Sociality | Sociality is the degree to which individuals in an animal population tend to associate in social groups (gregariousness) and form cooperative societies.
Sociality is a survival response to evolutionary pressures. For example, when a mother wasp stays near her larvae in the nest, parasites are less likely to eat the la... | Biology and health sciences | Ethology | null |
5782826 | https://en.wikipedia.org/wiki/Fractional%20crystallization%20%28chemistry%29 | Fractional crystallization (chemistry) | In chemistry, fractional crystallization is a stage-wise separation technique that relies on the liquid–solid phase change. This technique fractionates via differences in crystallization temperature and enables the purification of multi-component mixtures, as long as none of the constituents can act as solvents to the... | Physical sciences | Other separations | Chemistry |
5782961 | https://en.wikipedia.org/wiki/Linckia%20laevigata | Linckia laevigata | Linckia laevigata (sometimes called the "blue Linckia" or blue star) is a species of sea star in the shallow waters of tropical Indo-Pacific.
Description and characteristics
The variation ("polymorphism", in this case, a "color morph") most commonly found is pure blue, dark blue, or light blue, although observers fin... | Biology and health sciences | Echinoderms | Animals |
17765610 | https://en.wikipedia.org/wiki/Climate%20change%20in%20Japan | Climate change in Japan | Climate change is an urgent and significant issue affecting Japan. In recent years, the country has observed notable changes in its climate patterns, with rising temperatures serving as a prominent indicator of this phenomenon. As an archipelago situated in northeastern Asia, Japan is particularly vulnerable to the imp... | Physical sciences | Climate change | Earth science |
646125 | https://en.wikipedia.org/wiki/Heterosis | Heterosis | Heterosis, hybrid vigor, or outbreeding enhancement is the improved or increased function of any biological quality in a hybrid offspring. An offspring is heterotic if its traits are enhanced as a result of mixing the genetic contributions of its parents. The heterotic offspring often has traits that are more than the ... | Biology and health sciences | Genetics | Biology |
646257 | https://en.wikipedia.org/wiki/Machine%20press | Machine press | A forming press, commonly shortened to press, is a machine tool that changes the shape of a work-piece by the application of pressure. The operator of a forming press is known as a press-tool setter, often shortened to tool-setter.
Presses can be classified according to
their mechanism: hydraulic, mechanical, pneumat... | Technology | Industrial machinery | null |
646651 | https://en.wikipedia.org/wiki/Bisection%20method | Bisection method | In mathematics, the bisection method is a root-finding method that applies to any continuous function for which one knows two values with opposite signs. The method consists of repeatedly bisecting the interval defined by these values and then selecting the subinterval in which the function changes sign, and therefore... | Mathematics | Real analysis | null |
646664 | https://en.wikipedia.org/wiki/Sai%20%28weapon%29 | Sai (weapon) | The sai (Japanese: 釵, ; Chinese: 鐵尺, ) is a pointed melee weapon from Okinawa. It was historically utilized in martial arts such as Okinawan kobudō and southern Chinese martial arts, and has been absorbed into the curriculum of many modern martial arts. Although similar weapons can be found in other parts of Asia, the ... | Technology | Melee weapons | null |
646748 | https://en.wikipedia.org/wiki/Midazolam | Midazolam | Midazolam, sold under the brand name Versed among others, is a benzodiazepine medication used for anesthesia, premedication before surgical anesthesia, and procedural sedation, and to treat severe agitation. It induces sleepiness, decreases anxiety, and causes anterograde amnesia.
The drug does not cause an individual... | Biology and health sciences | Anesthetics | Health |
646796 | https://en.wikipedia.org/wiki/Regula%20falsi | Regula falsi | In mathematics, the regula falsi, method of false position, or false position method is a very old method for solving an equation with one unknown; this method, in modified form, is still in use. In simple terms, the method is the trial and error technique of using test ("false") values for the variable and then adjust... | Mathematics | Real analysis | null |
646817 | https://en.wikipedia.org/wiki/Agrobacterium%20tumefaciens | Agrobacterium tumefaciens | Agrobacterium tumefaciens (also known as Rhizobium radiobacter) is the causal agent of crown gall disease (the formation of tumours) in over 140 species of eudicots. It is a rod-shaped, Gram-negative soil bacterium. Symptoms are caused by the insertion of a small segment of DNA (known as T-DNA, for 'transfer DNA', not ... | Biology and health sciences | Gram-negative bacteria | Plants |
647987 | https://en.wikipedia.org/wiki/Dryland%20farming | Dryland farming | Dryland farming and dry farming encompass specific agricultural techniques for the non-irrigated cultivation of crops. Dryland farming is associated with drylands, areas characterized by a cool wet season (which charges the soil with virtually all the moisture that the crops will receive prior to harvest) followed by a... | Technology | Agriculture_2 | null |
648312 | https://en.wikipedia.org/wiki/Pterophyllum | Pterophyllum | Pterophyllum is a small genus of freshwater fish from the family Cichlidae known to most aquarists as angelfish. All Pterophyllum species originate from the Amazon Basin, Orinoco Basin and various rivers in the Guiana Shield in tropical South America. The three species of Pterophyllum are unusually shaped for cichlids ... | Biology and health sciences | Acanthomorpha | Animals |
648614 | https://en.wikipedia.org/wiki/Exponential%20integral | Exponential integral | In mathematics, the exponential integral Ei is a special function on the complex plane.
It is defined as one particular definite integral of the ratio between an exponential function and its argument.
Definitions
For real non-zero values of x, the exponential integral Ei(x) is defined as
Properties
Several properties... | Mathematics | Specific functions | null |
648954 | https://en.wikipedia.org/wiki/Visual%20acuity | Visual acuity | Visual acuity (VA) commonly refers to the clarity of vision, but technically rates an animal's ability to recognize small details with precision. Visual acuity depends on optical and neural factors. Optical factors of the eye influence the sharpness of an image on its retina. Neural factors include the health and funct... | Biology and health sciences | Visual system | Biology |
649259 | https://en.wikipedia.org/wiki/Chromite | Chromite | Chromite is a crystalline mineral composed primarily of iron(II) oxide and chromium(III) oxide compounds. It can be represented by the chemical formula of FeCr2O4. It is an oxide mineral belonging to the spinel group. The element magnesium can substitute for iron in variable amounts as it forms a solid solution with ma... | Physical sciences | Minerals | Earth science |
649634 | https://en.wikipedia.org/wiki/Pinus%20longaeva | Pinus longaeva | Pinus longaeva (commonly referred to as the Great Basin bristlecone pine, intermountain bristlecone pine, or western bristlecone pine) is a long-living species of bristlecone pine tree found in the higher mountains of California, Nevada, and Utah. Methuselah is a Great Basin bristlecone pine that is years old and has ... | Biology and health sciences | Pinaceae | Plants |
649760 | https://en.wikipedia.org/wiki/Leptospirosis | Leptospirosis | Leptospirosis is a blood infection caused by the bacterium Leptospira that can infect humans, dogs, rodents and many other wild and domesticated animals. Signs and symptoms can range from none to mild (headaches, muscle pains, and fevers) to severe (bleeding in the lungs or meningitis). Weil's disease ( ), the acute, s... | Biology and health sciences | Bacterial infections | Health |
650327 | https://en.wikipedia.org/wiki/Morning | Morning | Morning is the period from sunrise to noon. It is preceded by the twilight period of dawn. There are no exact times for when morning begins (also true of evening and night) because it can vary according to one's lifestyle, latitude, and the hours of daylight at each time of year. However, morning strictly ends at noon,... | Physical sciences | Celestial mechanics | Astronomy |
4343813 | https://en.wikipedia.org/wiki/Portunidae | Portunidae | Portunidae is a family of crabs which contains the swimming crabs. Its members include many well-known shoreline crabs, such as the blue crab (Callinectes sapidus) and velvet crab (Necora puber). Two genera in the family are contrastingly named Scylla and Charybdis; the former contains the economically important specie... | Biology and health sciences | Crabs and hermit crabs | Animals |
3191861 | https://en.wikipedia.org/wiki/Abdomen | Abdomen | The abdomen (colloquially called the belly, tummy, midriff, tucky, or stomach) is the front part of the torso between the thorax (chest) and pelvis in humans and in other vertebrates. The area occupied by the abdomen is called the abdominal cavity. In arthropods, it is the posterior tagma of the body; it follows the th... | Biology and health sciences | Animal: General | null |
3192578 | https://en.wikipedia.org/wiki/Potamotrygonidae | Potamotrygonidae | River stingrays or freshwater stingrays are Neotropical freshwater fishes of the family Potamotrygonidae in the order Myliobatiformes, one of the four orders of batoids, cartilaginous fishes related to sharks. They are found in rivers in tropical and subtropical South America (freshwater stingrays in Africa, Asia and A... | Biology and health sciences | Batoidea | Animals |
3193012 | https://en.wikipedia.org/wiki/Interacting%20galaxy | Interacting galaxy | Interacting galaxies (colliding galaxies) are galaxies whose gravitational fields result in a disturbance of one another. An example of a minor interaction is a satellite galaxy disturbing the primary galaxy's spiral arms. An example of a major interaction is a galactic collision, which may lead to a galaxy merger.
Sa... | Physical sciences | Basics_2 | Astronomy |
3196565 | https://en.wikipedia.org/wiki/Fish%20hatchery | Fish hatchery | A fish hatchery is a place for artificial breeding, hatching, and rearing through the early life stages of animals—finfish and shellfish in particular. Hatcheries produce larval and juvenile fish, shellfish, and crustaceans, primarily to support the aquaculture industry where they are transferred to on-growing systems,... | Technology | Buildings and infrastructure | null |
9774228 | https://en.wikipedia.org/wiki/Flatbed%20truck | Flatbed truck | A flatbed truck (or flatbed lorry in British English) is a type of truck the bodywork of which is just an entirely flat, level 'bed' with no sides or roof.
This allows for quick and easy loading of goods, and consequently they are used to transport heavy loads that are not delicate or vulnerable to rain, and also for ... | Technology | Motorized road transport | null |
9779915 | https://en.wikipedia.org/wiki/Helicidae | Helicidae | Helicidae is a large, diverse family of western Palaearctic, medium to large-sized, air-breathing land snails, sometimes called the "typical snails." It includes some of the largest European land snails, several species are common in anthropogenic habitats, and some became invasive on other continents. A number of spec... | Biology and health sciences | Gastropods | Animals |
1088870 | https://en.wikipedia.org/wiki/Output%20device | Output device | An output device is any piece of computer hardware that converts information or data into a human-perceptible form or, historically, into a physical machine-readable form for use with other non-computerized equipment. It can be text, graphics, tactile, audio, or video. Examples include monitors, printers and sound card... | Technology | Computer hardware | null |
1089079 | https://en.wikipedia.org/wiki/Miller%20index | Miller index | Miller indices form a notation system in crystallography for lattice planes in crystal (Bravais) lattices.
In particular, a family of lattice planes of a given (direct) Bravais lattice is determined by three integers h, k, and ℓ, the Miller indices. They are written (hkℓ), and denote the family of (parallel) lattice p... | Physical sciences | Crystallography | Physics |
1089621 | https://en.wikipedia.org/wiki/Telogen%20effluvium | Telogen effluvium | Telogen effluvium is a scalp disorder characterized by the thinning or shedding of hair resulting from the early entry of hair in the telogen phase (the resting phase of the hair follicle). It is in this phase that telogen hairs begin to shed at an increased rate, where normally the approximate rate of hair loss (havin... | Biology and health sciences | Health and fitness: General | Health |
1090852 | https://en.wikipedia.org/wiki/Software%20prototyping | Software prototyping | Software prototyping is the activity of creating prototypes of software applications, i.e., incomplete versions of the software program being developed. It is an activity that can occur in software development and is comparable to prototyping as known from other fields, such as mechanical engineering or manufacturing.
... | Technology | Software development: General | null |
1091093 | https://en.wikipedia.org/wiki/Lath%20and%20plaster | Lath and plaster | Lath and plaster is a building process used to finish mainly interior dividing walls and ceilings. It consists of narrow strips of wood (laths) which are nailed horizontally across the wall studs or ceiling joists and then coated in plaster. The technique derives from an earlier, more primitive process called wattle an... | Technology | Building materials | null |
1091105 | https://en.wikipedia.org/wiki/Thorny%20devil | Thorny devil | The thorny devil (Moloch horridus), also known commonly as the mountain devil, thorny lizard, thorny dragon, and moloch, is a species of lizard in the family Agamidae. The species is endemic to Australia. It is the sole species in the genus Moloch. It grows up to in total length (including tail), with females generall... | Biology and health sciences | Iguania | Animals |
1091325 | https://en.wikipedia.org/wiki/BL%20Lacertae | BL Lacertae | BL Lacertae or BL Lac is a highly variable, extragalactic active galactic nucleus (AGN or active galaxy). It was first discovered by Cuno Hoffmeister in 1929, but was originally thought to be an irregular variable star in the Milky Way galaxy and so was given a variable star designation. In 1968, the "star" was identi... | Physical sciences | Notable galaxies | Astronomy |
2316934 | https://en.wikipedia.org/wiki/Haplogroup | Haplogroup | A haplotype is a group of alleles in an organism that are inherited together from a single parent, and a haplogroup (haploid from the , haploûs, "onefold, simple" and ) is a group of similar haplotypes that share a common ancestor with a single-nucleotide polymorphism mutation. More specifically, a haplotype is a combi... | Biology and health sciences | Basics_4 | Biology |
2319263 | https://en.wikipedia.org/wiki/Thelodonti | Thelodonti | Thelodonti (from Greek: "nipple teeth") is a class of extinct Palaeozoic jawless fishes with distinctive scales instead of large plates of armor.
There is much debate over whether the group represents a monophyletic grouping, or disparate stem groups to the major lines of jawless and jawed fish.
Thelodonts are united... | Biology and health sciences | Prehistoric agnathae and early chordates | Animals |
2319292 | https://en.wikipedia.org/wiki/Anaspida | Anaspida | Anaspida ("shieldless ones") is an extinct group of jawless fish that existed from the early Silurian period to the late Devonian period. They were classically regarded as the ancestors of lampreys, but it is denied in recent phylogenetic analysis, although some analysis show these group would be at least related. Anas... | Biology and health sciences | Prehistoric agnathae and early chordates | Animals |
2321587 | https://en.wikipedia.org/wiki/Degrees%20of%20freedom%20%28mechanics%29 | Degrees of freedom (mechanics) | In physics, the degrees of freedom (DOF) of a mechanical system is the number of independent parameters that define its configuration or state. It is important in the analysis of systems of bodies in mechanical engineering, structural engineering, aerospace engineering, robotics, and other fields.
The position of a si... | Physical sciences | Basics_4 | Physics |
2322181 | https://en.wikipedia.org/wiki/Postosuchus | Postosuchus | Postosuchus, meaning "Crocodile from Post", is an extinct genus of rauisuchid reptiles comprising two species, P. kirkpatricki and P. alisonae, that lived in what is now North America during the Late Triassic. Postosuchus is a member of the clade Pseudosuchia, the lineage of archosaurs that includes modern crocodilian... | Biology and health sciences | Other prehistoric archosaurs | Animals |
376476 | https://en.wikipedia.org/wiki/Ocean%20current | Ocean current | An ocean current is a continuous, directed movement of seawater generated by a number of forces acting upon the water, including wind, the Coriolis effect, breaking waves, cabbeling, and temperature and salinity differences. Depth contours, shoreline configurations, and interactions with other currents influence a curr... | Physical sciences | Oceanography | null |
376707 | https://en.wikipedia.org/wiki/R%20%28programming%20language%29 | R (programming language) | R is a programming language for statistical computing and data visualization. It has been adopted in the fields of data mining, bioinformatics and data analysis.
The core R language is augmented by a large number of extension packages, containing reusable code, documentation, and sample data.
R software is open-sourc... | Technology | Programming languages | null |
376774 | https://en.wikipedia.org/wiki/Gas%20mantle | Gas mantle | An incandescent gas mantle, gas mantle or Welsbach mantle is a device for generating incandescent bright white light when heated by a flame. The name refers to its original heat source in gas lights which illuminated the streets of Europe and North America in the late 19th century. Mantle refers to the way it hangs li... | Technology | Lighting | null |
376845 | https://en.wikipedia.org/wiki/Cooper%20pair | Cooper pair | In condensed matter physics, a Cooper pair or BCS pair (Bardeen–Cooper–Schrieffer pair) is a pair of electrons (or other fermions) bound together at low temperatures in a certain manner first described in 1956 by American physicist Leon Cooper.
Description
Cooper showed that an arbitrarily small attraction between ele... | Physical sciences | Electrical circuits | Physics |
376885 | https://en.wikipedia.org/wiki/Diffraction-limited%20system | Diffraction-limited system | In optics, any optical instrument or systema microscope, telescope, or camerahas a principal limit to its resolution due to the physics of diffraction. An optical instrument is said to be diffraction-limited if it has reached this limit of resolution performance. Other factors may affect an optical system's performance... | Physical sciences | Waves | Physics |
376967 | https://en.wikipedia.org/wiki/Rosin | Rosin | Rosin (), also known as colophony or Greek pitch (), is a resinous material obtained from pine trees and other plants, mostly conifers. The primary components of rosin are diterpenoids, i.e., C20 carboxylic acids. Rosin consists mainly of resin acids, especially abietic acid. Rosin often appears as a semi-transparent,... | Physical sciences | Terpenes and terpenoids | Chemistry |
377055 | https://en.wikipedia.org/wiki/Frostbite | Frostbite | Frostbite is a skin injury that occurs when someone is exposed to extremely low temperatures, causing the freezing of the skin or other tissues, commonly affecting the fingers, toes, nose, ears, cheeks and chin areas. Most often, frostbite occurs in the hands and feet. The initial symptoms are typically a feeling of co... | Biology and health sciences | Injury | null |
377204 | https://en.wikipedia.org/wiki/Fire%20ant | Fire ant | Fire ants are several species of ants in the genus Solenopsis, which includes over 200 species. Solenopsis are stinging ants, and most of their common names reflect this, for example, ginger ants and tropical fire ants. Many of the names shared by this genus are often used interchangeably to refer to other species of a... | Biology and health sciences | Hymenoptera | null |
377228 | https://en.wikipedia.org/wiki/Cyanogen | Cyanogen | Cyanogen is the chemical compound with the formula (CN). The simplest stable carbon nitride, it is a colorless and highly toxic gas with a pungent odor. The molecule is a pseudohalogen. Cyanogen molecules consist of two CN groups ‒ analogous to diatomic halogen molecules, such as Cl, but far less oxidizing. The two cya... | Physical sciences | Molecular compounds | Chemistry |
377397 | https://en.wikipedia.org/wiki/American%20lobster | American lobster | The American lobster (Homarus americanus) is a species of lobster found on the Atlantic coast of North America, chiefly from Labrador to New Jersey. It is also known as Atlantic lobster, Canadian lobster, true lobster, northern lobster, Canadian Reds, or Maine lobster. It can reach a body length of , and a mass of over... | Biology and health sciences | Crayfishes and lobsters | Animals |
377519 | https://en.wikipedia.org/wiki/Harbour%20porpoise | Harbour porpoise | The harbour porpoise (Phocoena phocoena) is one of eight extant species of porpoise. It is one of the smallest species of cetacean. As its name implies, it stays close to coastal areas or river estuaries, and as such, is the most familiar porpoise to whale watchers. This porpoise often ventures up rivers, and has been... | Biology and health sciences | Toothed whale | Animals |
377738 | https://en.wikipedia.org/wiki/Mantle%20plume | Mantle plume | A mantle plume is a proposed mechanism of convection within the Earth's mantle, hypothesized to explain anomalous volcanism. Because the plume head partially melts on reaching shallow depths, a plume is often invoked as the cause of volcanic hotspots, such as Hawaii or Iceland, and large igneous provinces such as the D... | Physical sciences | Geophysics | Earth science |
377931 | https://en.wikipedia.org/wiki/Seismic%20tomography | Seismic tomography | Seismic tomography or seismotomography is a technique for imaging the subsurface of the Earth using seismic waves. The properties of seismic waves are modified by the material through which they travel. By comparing the differences in seismic waves recorded at different locations, it is possible to create a model of th... | Physical sciences | Seismology | Earth science |
378193 | https://en.wikipedia.org/wiki/Coprocessor | Coprocessor | A coprocessor is a computer processor used to supplement the functions of the primary processor (the CPU). Operations performed by the coprocessor may be floating-point arithmetic, graphics, signal processing, string processing, cryptography or I/O interfacing with peripheral devices. By offloading processor-intensive ... | Technology | Computer hardware | null |
378200 | https://en.wikipedia.org/wiki/Lowest%20common%20denominator | Lowest common denominator | In mathematics, the lowest common denominator or least common denominator (abbreviated LCD) is the lowest common multiple of the denominators of a set of fractions. It simplifies adding, subtracting, and comparing fractions.
Description
The lowest common denominator of a set of fractions is the lowest number that is ... | Mathematics | Basics | null |
378269 | https://en.wikipedia.org/wiki/Helium%E2%80%93neon%20laser | Helium–neon laser | A helium–neon laser or He–Ne laser is a type of gas laser whose high energetic gain medium consists of a mixture of helium and neon (ratio between 5:1 and 20:1) at a total pressure of approximately 1 Torr (133 Pa) inside a small electrical discharge. The best-known and most widely used He-Ne laser operates at a center ... | Technology | Lasers | null |
378297 | https://en.wikipedia.org/wiki/Rest%20area | Rest area | A rest area is a public facility located next to a large thoroughfare such as a motorway, expressway, or highway, at which drivers and passengers can rest, eat, or refuel without exiting onto secondary roads. Other names include motorway service area (UK), services (UK), travel plaza, rest stop, oasis (US), service a... | Technology | Concepts of ground transport | null |
378569 | https://en.wikipedia.org/wiki/Hydrozoa | Hydrozoa | Hydrozoa (hydrozoans; ) is a taxonomic class of individually very small, predatory animals, some solitary and some colonial, most of which inhabit saline water. The colonies of the colonial species can be large, and in some cases the specialized individual animals cannot survive outside the colony. A few genera within ... | Biology and health sciences | Cnidarians | Animals |
378579 | https://en.wikipedia.org/wiki/Bupropion | Bupropion | Bupropion, formerly called amfebutamone, and sold under the brand name Wellbutrin among others, is an atypical antidepressant that is US FDA-approved to treat major depressive disorder, seasonal affective disorder and to support smoking cessation. It is also popular as an add-on medication in the cases of "incomplete r... | Biology and health sciences | Psychiatric drugs | Health |
378598 | https://en.wikipedia.org/wiki/Tunicate | Tunicate | A tunicate is an exclusively marine invertebrate animal, a member of the subphylum Tunicata ( ). This grouping is part of the Chordata, a phylum which includes all animals with dorsal nerve cords and notochords (including vertebrates). The subphylum was at one time called Urochordata, and the term urochordates is still... | Biology and health sciences | Chordata (except vertebrates) | Animals |
378625 | https://en.wikipedia.org/wiki/War%20elephant | War elephant | A war elephant is an elephant that is trained and guided by humans for combat purposes. Historically, the war elephant's main use was to charge the enemy, break their ranks, and instill terror and fear. Elephantry is a term for specific military units using elephant-mounted troops. In modern times, war elephants on the... | Technology | Military technology: General | null |
378645 | https://en.wikipedia.org/wiki/Endotherm | Endotherm | An endotherm (from Greek ἔνδον endon "within" and θέρμη thermē "heat") is an organism that maintains its body at a metabolically favorable temperature, largely by the use of heat released by its internal bodily functions instead of relying almost purely on ambient heat. Such internally generated heat is mainly an incid... | Biology and health sciences | Basics | Biology |
378653 | https://en.wikipedia.org/wiki/Anthozoa | Anthozoa | Anthozoa is a class of marine invertebrates which includes sessile cnidarians such as the sea anemones, stony corals, soft corals and sea pens. Adult anthozoans are almost all attached to the seabed, while their larvae can disperse as planktons. The basic unit of the adult is the polyp; this consists of a cylindrical c... | Biology and health sciences | Cnidarians | Animals |
378661 | https://en.wikipedia.org/wiki/Thermoregulation | Thermoregulation | Thermoregulation is the ability of an organism to keep its body temperature within certain boundaries, even when the surrounding temperature is very different. A thermoconforming organism, by contrast, simply adopts the surrounding temperature as its own body temperature, thus avoiding the need for internal thermoregul... | Biology and health sciences | Basics_3 | null |
378763 | https://en.wikipedia.org/wiki/Accipiter | Accipiter | Accipiter () is a genus of birds of prey in the family Accipitridae. Most species are called sparrowhawks, but there are many sparrowhawks in other genera too, such as Tachyspiza.
These birds are slender with short, broad, rounded wings and a long tail which helps them maneuver in flight. They have long legs and long... | Biology and health sciences | Accipitriformes and Falconiformes | null |
378783 | https://en.wikipedia.org/wiki/Ectotherm | Ectotherm | An ectotherm (from the Greek () "outside" and () "heat"), more commonly referred to as a "cold-blooded animal", is an animal in which internal physiological sources of heat, such as blood, are of relatively small or of quite negligible importance in controlling body temperature. Such organisms (frogs, for example) re... | Biology and health sciences | Basics | Biology |
379035 | https://en.wikipedia.org/wiki/Asian%20elephant | Asian elephant | The Asian elephant (Elephas maximus), also known as the Asiatic elephant, is a species of elephant distributed throughout the Indian subcontinent and Southeast Asia, from India in the west to Borneo in the east, and Nepal in the north to Sumatra in the south. Three subspecies are recognised—E. m. maximus, E. m. indicus... | Biology and health sciences | Proboscidea | Animals |
379202 | https://en.wikipedia.org/wiki/American%20bullfrog | American bullfrog | The American bullfrog (Lithobates catesbeianus), often simply known as the bullfrog in Canada and the United States, is a large true frog native to eastern North America. It typically inhabits large permanent water bodies such as swamps, ponds, and lakes. Bullfrogs can also be found in manmade habitats such as pools, k... | Biology and health sciences | Amphibians | null |
379210 | https://en.wikipedia.org/wiki/Colorado%20potato%20beetle | Colorado potato beetle | The Colorado potato beetle (Leptinotarsa decemlineata; also known as the Colorado beetle, the ten-striped spearman, the ten-lined potato beetle, and the potato bug) is a beetle known for being a major pest of potato crops. It is about long, with a bright yellow/orange body and five bold brown stripes along the length ... | Biology and health sciences | Beetles (Coleoptera) | Animals |
379224 | https://en.wikipedia.org/wiki/True%20frog | True frog | True frogs is the common name for the frog family Ranidae. They have the widest distribution of any frog family. They are abundant throughout most of the world, occurring on all continents except Antarctica. The true frogs are present in North America, northern South America, Europe, Africa (including Madagascar), and ... | Biology and health sciences | Amphibians | null |
379234 | https://en.wikipedia.org/wiki/Sensory%20nervous%20system | Sensory nervous system | The sensory nervous system is a part of the nervous system responsible for processing sensory information. A sensory system consists of sensory neurons (including the sensory receptor cells), neural pathways, and parts of the brain involved in sensory perception and interoception. Commonly recognized sensory systems... | Biology and health sciences | Nervous system | null |
379257 | https://en.wikipedia.org/wiki/Damselfish | Damselfish | Damselfish are those within the subfamilies Abudefdufinae, Chrominae, Lepidozyginae, Pomacentrinae, and Stegastinae within the family Pomacentridae. Most species within this group are relatively small, with the largest species being about 30cm (12 in) in length. Most damselfish species exist only in marine environments... | Biology and health sciences | Acanthomorpha | Animals |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.