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351806 | https://en.wikipedia.org/wiki/Fractionating%20column | Fractionating column | A fractionating column or fractional column is equipment used in the distillation of liquid mixtures to separate the mixture into its component parts, or fractions, based on their differences in volatility. Fractionating columns are used in small-scale laboratory distillations as well as large-scale industrial distilla... | Physical sciences | Phase separations | Chemistry |
351882 | https://en.wikipedia.org/wiki/Automotive%20engineering | Automotive engineering | Automotive engineering, along with aerospace engineering and naval architecture, is a branch of vehicle engineering, incorporating elements of mechanical, electrical, electronic, software, and safety engineering as applied to the design, manufacture and operation of motorcycles, automobiles, and trucks and their respec... | Technology | Disciplines | null |
352085 | https://en.wikipedia.org/wiki/Metasyntax | Metasyntax | A metasyntax is a syntax used to define the syntax of a programming language or formal language. It describes the allowable structure and composition of phrases and sentences of a metalanguage, which is used to describe either a natural language or a computer programming language. Some of the widely used formal metalan... | Technology | Programming languages | null |
352184 | https://en.wikipedia.org/wiki/Tincture | Tincture | A tincture is typically an extract of plant or animal material dissolved in ethanol (ethyl alcohol). Solvent concentrations of 25–60% are common, but may run as high as 90%. In chemistry, a tincture is a solution that has ethanol as its solvent. In herbal medicine, alcoholic tinctures are made with various ethanol conc... | Physical sciences | Mixture | Chemistry |
352327 | https://en.wikipedia.org/wiki/Sawmill | Sawmill | A sawmill (saw mill, saw-mill) or lumber mill is a facility where logs are cut into lumber. Modern sawmills use a motorized saw to cut logs lengthwise to make long pieces, and crosswise to length depending on standard or custom sizes (dimensional lumber). The "portable" sawmill is simple to operate. The log lies flat o... | Technology | Building materials | null |
352349 | https://en.wikipedia.org/wiki/Fonio | Fonio | Fonio, also sometimes called findi or acha, is the term for two cultivated grasses in the genus Digitaria that are important crops in parts of West Africa. The nutritious food with a favorable taste is a vital food source in many rural areas, especially in the mountains of Fouta Djalon, Guinea, but it is also cultivate... | Biology and health sciences | Grains | Plants |
352353 | https://en.wikipedia.org/wiki/Spirit%20level | Spirit level | A spirit level, bubble level, or simply a level, is an instrument designed to indicate whether a surface is horizontal (level) or vertical (plumb).
Two basic designs exist: tubular (or linear) and bull's eye (or circular).
Different types of spirit levels may be used by carpenters, stonemasons, bricklayers, other buil... | Technology | Surveying tools | null |
352453 | https://en.wikipedia.org/wiki/Bucket | Bucket | A bucket is typically a watertight, vertical cylinder or truncated cone or square, with an open top and a flat bottom, attached to a semicircular carrying handle called the bail.
A bucket is usually an open-top container. In contrast, a pail can have a top or lid and is a shipping container. In non-technical usage, th... | Technology | Containers | null |
352905 | https://en.wikipedia.org/wiki/R-process | R-process | In nuclear astrophysics, the rapid neutron-capture process, also known as the r-process, is a set of nuclear reactions that is responsible for the creation of approximately half of the atomic nuclei heavier than iron, the "heavy elements", with the other half produced by the p-process and s-process. The r-process usual... | Physical sciences | Stellar astronomy | Astronomy |
352908 | https://en.wikipedia.org/wiki/S-process | S-process | The slow neutron-capture process, or s-process, is a series of reactions in nuclear astrophysics that occur in stars, particularly asymptotic giant branch stars. The s-process is responsible for the creation (nucleosynthesis) of approximately half the atomic nuclei heavier than iron.
In the s-process, a seed nucleus u... | Physical sciences | Stellar astronomy | Astronomy |
352960 | https://en.wikipedia.org/wiki/Hysterectomy | Hysterectomy | Hysterectomy is the surgical removal of the uterus and cervix. Supracervical hysterectomy refers to removal of the uterus while the cervix is spared. These procedures may also involve removal of the ovaries (oophorectomy), fallopian tubes (salpingectomy), and other surrounding structures. The term “partial” or “total” ... | Biology and health sciences | Surgery | Health |
353021 | https://en.wikipedia.org/wiki/Homeomorphism%20%28graph%20theory%29 | Homeomorphism (graph theory) | In graph theory, two graphs and are homeomorphic if there is a graph isomorphism from some subdivision of to some subdivision of . If the edges of a graph are thought of as lines drawn from one vertex to another (as they are usually depicted in diagrams), then two graphs are homeomorphic to each other in the graph-... | Mathematics | Graph theory | null |
353042 | https://en.wikipedia.org/wiki/Graph%20minor | Graph minor | In graph theory, an undirected graph is called a minor of the graph if can be formed from by deleting edges, vertices and by contracting edges.
The theory of graph minors began with Wagner's theorem that a graph is planar if and only if its minors include neither the complete graph nor the complete bipartite grap... | Mathematics | Graph theory | null |
353091 | https://en.wikipedia.org/wiki/Malacology | Malacology | Malacology is the branch of invertebrate zoology that deals with the study of the Mollusca (molluscs or mollusks), the second-largest phylum of animals in terms of described species after the arthropods. Mollusks include snails and slugs, clams, and cephalopods, along with numerous other kinds, many of which have shell... | Biology and health sciences | Basics_2 | Biology |
353767 | https://en.wikipedia.org/wiki/Grand%20Coulee%20Dam | Grand Coulee Dam | Grand Coulee Dam is a concrete gravity dam on the Columbia River in the U.S. state of Washington, built to produce hydroelectric power and provide irrigation water. Constructed between 1933 and 1942, Grand Coulee originally had two powerhouses. The third powerhouse ("Nat"), completed in 1974 to increase energy producti... | Technology | Dams | null |
354042 | https://en.wikipedia.org/wiki/Malachite | Malachite | Malachite is a copper carbonate hydroxide mineral, with the formula Cu2CO3(OH)2. This opaque, green-banded mineral crystallizes in the monoclinic crystal system, and most often forms botryoidal, fibrous, or stalagmitic masses, in fractures and deep, underground spaces, where the water table and hydrothermal fluids prov... | Physical sciences | Minerals | Earth science |
354300 | https://en.wikipedia.org/wiki/Craniate | Craniate | A craniate is a member of the Craniata (sometimes called the Craniota), a proposed clade of chordate animals with a skull of hard bone or cartilage. Living representatives are the Myxini (hagfishes), Hyperoartia (including lampreys), and the much more numerous Gnathostomata (jawed vertebrates). Formerly distinct from v... | Biology and health sciences | General classifications_2 | Animals |
5657877 | https://en.wikipedia.org/wiki/Type%20I%20and%20type%20II%20errors | Type I and type II errors | In statistical hypothesis testing, a type I error, or a false positive, is the rejection of the null hypothesis when it is actually true. A type II error, or a false negative, is the failure to reject a null hypothesis that is actually false.
Type I error: an innocent person may be convicted. Type II error: a guilty p... | Mathematics | Statistics | null |
5662719 | https://en.wikipedia.org/wiki/Wood%20turtle | Wood turtle | The wood turtle (Glyptemys insculpta) is a species of turtle in the family Emydidae. The species is native to northeastern North America. The genus Glyptemys contains only one other species of turtle: the bog turtle (Glyptemys muhlenbergii). The wood turtle reaches a straight carapace length of , its defining character... | Biology and health sciences | Turtles | Animals |
16315657 | https://en.wikipedia.org/wiki/High-definition%20television | High-definition television | High-definition television (HDTV) describes a television or video system which provides a substantially higher image resolution than the previous generation of technologies. The term has been used since at least 1933; in more recent times, it refers to the generation following standard-definition television (SDTV). It ... | Technology | Broadcasting | null |
4246681 | https://en.wikipedia.org/wiki/Glaucus%20atlanticus | Glaucus atlanticus | Glaucus atlanticus (common names include the blue sea dragon, sea swallow, blue angel, blue glaucus, dragon slug, blue dragon, blue sea slug, and blue ocean slug) is a species of sea slug in the family Glaucidae.
These sea slugs live in the pelagic zone (open ocean), where they float upside-down by using the surface t... | Biology and health sciences | Gastropods | Animals |
4248491 | https://en.wikipedia.org/wiki/Gauche%20effect | Gauche effect | In the study of conformational isomerism, the gauche effect is an atypical situation where a gauche conformation (groups separated by a torsion angle of approximately 60°) is more stable than the anti conformation (180°).
There are both steric and electronic effects that affect the relative stability of conformers. Or... | Physical sciences | Stereochemistry | Chemistry |
3113497 | https://en.wikipedia.org/wiki/Innate%20immune%20system | Innate immune system | The innate immune system or nonspecific immune system is one of the two main immunity strategies in vertebrates (the other being the adaptive immune system). The innate immune system is an alternate defense strategy and is the dominant immune system response found in plants, fungi, prokaryotes, and invertebrates (see B... | Biology and health sciences | Immune system | Biology |
3115583 | https://en.wikipedia.org/wiki/Complexometric%20indicator | Complexometric indicator | A complexometric indicator is an ionochromic dye that undergoes a definite color change in presence of specific metal ions. It forms a weak complex with the ions present in the solution, which has a significantly different color from the form existing outside the complex.
Complexometric indicators are also known as pM ... | Physical sciences | Chemical methods | Chemistry |
3117240 | https://en.wikipedia.org/wiki/Gamma%20Cassiopeiae | Gamma Cassiopeiae | Gamma Cassiopeiae, Latinized from γ Cassiopeiae, is a bright star at the center of the distinctive "W" asterism in the northern circumpolar constellation of Cassiopeia. Although it is a fairly bright star with an apparent visual magnitude that varies from 1.6 to 3.0, it has no traditional Arabic or Latin name. It somet... | Physical sciences | Notable stars | Astronomy |
12049028 | https://en.wikipedia.org/wiki/Hypercarnivore | Hypercarnivore | A hypercarnivore is an animal which has a diet that is more than 70% meat, either via active predation or by scavenging. The remaining non-meat diet may consist of non-animal foods such as fungi, fruits or other plant material. Some extant examples of hypercarnivorous animals include crocodilians, owls, shrikes, eagles... | Biology and health sciences | Ethology | Biology |
176670 | https://en.wikipedia.org/wiki/Operon | Operon | In genetics, an operon is a functioning unit of DNA containing a cluster of genes under the control of a single promoter. The genes are transcribed together into an mRNA strand and either translated together in the cytoplasm, or undergo splicing to create monocistronic mRNAs that are translated separately, i.e. several... | Biology and health sciences | Molecular biology | Biology |
176732 | https://en.wikipedia.org/wiki/Scent%20hound | Scent hound | Scent hounds (or scenthounds) are a type of hound that primarily hunts by scent rather than sight. These breeds are hunting dogs and are generally regarded as having some of the most sensitive noses among dogs. Scent hounds specialize in following scent or smells. Most of them tend to have long, drooping ears and large... | Biology and health sciences | Dogs | Animals |
176733 | https://en.wikipedia.org/wiki/Cylindrical%20coordinate%20system | Cylindrical coordinate system | A cylindrical coordinate system is a three-dimensional coordinate system that specifies point positions by the distance from a chosen reference axis (axis L in the image opposite), the direction from the axis relative to a chosen reference direction (axis A), and the distance from a chosen reference plane perpendicular... | Mathematics | Geometry: General | null |
176813 | https://en.wikipedia.org/wiki/Physical%20geodesy | Physical geodesy | Physical geodesy is the study of the physical properties of Earth's gravity and its potential field (the geopotential), with a view to their application in geodesy.
Measurement procedure
Traditional geodetic instruments such as theodolites rely on the gravity field for orienting their vertical axis along the local plu... | Physical sciences | Geophysics | Earth science |
176865 | https://en.wikipedia.org/wiki/Cache%20coherence | Cache coherence | In computer architecture, cache coherence is the uniformity of shared resource data that is stored in multiple local caches. In a cache coherent system, if multiple clients have a cached copy of the same region of a shared memory resource, all copies are the same. Without cache coherence, a change made to the region by... | Technology | Computer architecture concepts | null |
176883 | https://en.wikipedia.org/wiki/Major%20appliance | Major appliance | A major appliance, also known as a large domestic appliance or large electric appliance or simply a large appliance, large domestic, or large electric, is a non-portable or semi-portable machine used for routine housekeeping tasks such as cooking, washing laundry, or food preservation. Such appliances are sometimes col... | Technology | Household appliances | null |
176931 | https://en.wikipedia.org/wiki/Internet%20Archive | Internet Archive | The Internet Archive is an American non-profit organization founded in 1996 by Brewster Kahle that runs a digital library website, archive.org. It provides free access to collections of digitized media including websites, software applications, music, audiovisual, and print materials. The Archive also advocates a free ... | Technology | Utility | null |
176964 | https://en.wikipedia.org/wiki/Diode%20bridge | Diode bridge | A diode bridge is a bridge rectifier circuit of four diodes that is used in the process of converting alternating current (AC) from the input terminals to direct current (DC, i.e. fixed polarity) on the output terminals. Its function is to convert the negative voltage portions of the AC waveform to positive voltage, af... | Technology | Functional circuits | null |
177092 | https://en.wikipedia.org/wiki/Active%20galactic%20nucleus | Active galactic nucleus | An active galactic nucleus (AGN) is a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars. Such excess, non-stellar emissions have been observed in the radio, microwave, ... | Physical sciences | Active galactic nucleus | null |
177111 | https://en.wikipedia.org/wiki/Error%20function | Error function | In mathematics, the error function (also called the Gauss error function), often denoted by , is a function defined as:
The integral here is a complex contour integral which is path-independent because is holomorphic on the whole complex plane . In many applications, the function argument is a real number, in which ... | Mathematics | Specific functions | null |
177127 | https://en.wikipedia.org/wiki/Balance%20disorder | Balance disorder | A balance disorder is a disturbance that causes an individual to feel unsteady, for example when standing or walking. It may be accompanied by feelings of giddiness, or wooziness, or having a sensation of movement, spinning, or floating. Balance is the result of several body systems working together: the visual system ... | Biology and health sciences | Symptoms and signs | Health |
177163 | https://en.wikipedia.org/wiki/Emergency%20department | Emergency department | An emergency department (ED), also known as an accident and emergency department (A&E), emergency room (ER), emergency ward (EW) or casualty department, is a medical treatment facility specializing in emergency medicine, the acute care of patients who present without prior appointment; either by their own means or by t... | Biology and health sciences | General concepts | null |
177174 | https://en.wikipedia.org/wiki/Orion%20Nebula | Orion Nebula | The Orion Nebula (also known as Messier 42, M42, or NGC 1976) is a diffuse nebula situated in the Milky Way, being south of Orion's Belt in the constellation of Orion, and is known as the middle "star" in the "sword" of Orion. It is one of the brightest nebulae and is visible to the naked eye in the night sky with an ... | Physical sciences | Notable nebulae | null |
177215 | https://en.wikipedia.org/wiki/Photomultiplier%20tube | Photomultiplier tube | Photomultiplier tubes (photomultipliers or PMTs for short) are extremely sensitive detectors of light in the ultraviolet, visible, and near-infrared ranges of the electromagnetic spectrum. They are members of the class of vacuum tubes, more specifically vacuum phototubes. These detectors multiply the current produced b... | Technology | Components | null |
177320 | https://en.wikipedia.org/wiki/Spectral%20line | Spectral line | A spectral line is a weaker or stronger region in an otherwise uniform and continuous spectrum. It may result from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies. Spectral lines are often used to identify atoms and molecules. These "fingerprints" can be compared to the... | Physical sciences | Atomic physics | Physics |
177434 | https://en.wikipedia.org/wiki/Virgo%20Supercluster | Virgo Supercluster | The Local Supercluster (LSC or LS), or Virgo Supercluster is a formerly defined supercluster containing the Virgo Cluster and Local Group, which itself contains the Milky Way and Andromeda galaxies, as well as others. At least 100 galaxy groups and clusters are located within its diameter of 33 megaparsecs (110 million... | Physical sciences | Other notable objects | null |
177436 | https://en.wikipedia.org/wiki/Great%20Attractor | Great Attractor | The Great Attractor is a region of gravitational attraction in intergalactic space and the apparent central gravitational point of the Laniakea Supercluster of galaxies that includes the Milky Way galaxy, as well as about 100,000 other galaxies.
The observed attraction suggests a localized concentration of mass havin... | Physical sciences | Basics_3 | null |
177442 | https://en.wikipedia.org/wiki/Jumbo | Jumbo | Jumbo (December 25, 1860 – September 15, 1885), also known as Jumbo the Elephant and Jumbo the Circus Elephant, was a 19th-century male African bush elephant born in Sudan. Jumbo was exported to Jardin des Plantes, a zoo in Paris, and then transferred in 1865 to London Zoo in England. Despite public protest, Jumbo was ... | Biology and health sciences | Individual animals | Animals |
177515 | https://en.wikipedia.org/wiki/Molecular%20engineering | Molecular engineering | Molecular engineering is an emerging field of study concerned with the design and testing of molecular properties, behavior and interactions in order to assemble better materials, systems, and processes for specific functions. This approach, in which observable properties of a macroscopic system are influenced by direc... | Technology | Disciplines | null |
177602 | https://en.wikipedia.org/wiki/Outer%20space | Outer space | Outer space (or simply space) is the expanse that exists beyond Earth's atmosphere and between celestial bodies. It contains ultra-low levels of particle densities, constituting a near-perfect vacuum of predominantly hydrogen and helium plasma, permeated by electromagnetic radiation, cosmic rays, neutrinos, magnetic fi... | Physical sciences | Astronomy | null |
177938 | https://en.wikipedia.org/wiki/Moss | Moss | Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta (, ) sensu stricto. Bryophyta (sensu lato, Schimp. 1879) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and hornworts. Mosses typically form dense green clumps or mats, often in damp or shady location... | Biology and health sciences | Bryophytes | null |
178182 | https://en.wikipedia.org/wiki/Soyuz%20%28spacecraft%29 | Soyuz (spacecraft) | Soyuz () is a series of spacecraft which has been in service since the 1960s, having made more than 140 flights. It was designed for the Soviet space program by the Korolev Design Bureau (now Energia). The Soyuz succeeded the Voskhod spacecraft and was originally built as part of the Soviet crewed lunar programs. It is... | Technology | Crewed spacecraft | null |
178235 | https://en.wikipedia.org/wiki/Large%20Binocular%20Telescope | Large Binocular Telescope | The Large Binocular Telescope (LBT) is an optical telescope for astronomy located on Mount Graham, in the Pinaleno Mountains of southeastern Arizona, United States. It is a part of the Mount Graham International Observatory.
When using both 8.4 m (330 inch) wide mirrors, with centres 14.4 m apart, the LBT has the sam... | Technology | Ground-based observatories | null |
178300 | https://en.wikipedia.org/wiki/Intermodal%20container | Intermodal container | An intermodal container, often called a shipping container, or cargo container, (or simply "container") is a large metal crate designed and built for intermodal freight transport, meaning these containers can be used across different modes of transport – such as from ships to trains to trucks – without unloading and re... | Technology | Containers | null |
178345 | https://en.wikipedia.org/wiki/Acer%20platanoides | Acer platanoides | Acer platanoides, commonly known as the Norway maple, is a species of maple native to eastern and central Europe and western Asia, from Spain east to Russia, north to southern Scandinavia and southeast to northern Iran. It was introduced to North America in the mid-1700s as a shade tree. It is a member of the family Sa... | Biology and health sciences | Sapindales | Plants |
9585510 | https://en.wikipedia.org/wiki/Animal%20slaughter | Animal slaughter | Animal slaughter is the killing of animals, usually referring to killing domestic livestock. It is estimated that each year, 80 billion land animals are slaughtered for food. Most animals are slaughtered for food; however, they may also be slaughtered for other reasons such as for harvesting of pelts, being diseased a... | Technology | Animal husbandry | null |
1044681 | https://en.wikipedia.org/wiki/Mesh | Mesh | A mesh is a barrier made of interlaced strands of metal, fiber or other flexible or ductile materials. A mesh is similar to a web or a net in that it has many interwoven strands.
Types
A plastic mesh may be extruded, oriented, expanded, woven or tubular. It can be made from polypropylene, polyethylene, nylon, PVC or ... | Technology | Flexible components | null |
1044856 | https://en.wikipedia.org/wiki/Shotgun%20cartridge | Shotgun cartridge | A shotgun cartridge, shotshell, or shell is a type of rimmed, cylindrical (straight-walled) ammunition used specifically in shotguns. It is typically loaded with numerous small, spherical sub-projectiles called shot. Shotguns typically use a smoothbore barrel with a tapered constriction at the muzzle to regulate the ex... | Technology | Ammunition | null |
1044906 | https://en.wikipedia.org/wiki/Flipper%20%28anatomy%29 | Flipper (anatomy) | A flipper is a broad, flattened limb adapted for aquatic locomotion. It refers to the fully webbed, swimming appendages of aquatic vertebrates that are not fish.
In animals with two flippers, such as whales, the flipper refers solely to the forelimbs. In animals with four flippers, such as pinnipeds and sea turtles, o... | Biology and health sciences | External anatomy and regions of the body | Biology |
1045201 | https://en.wikipedia.org/wiki/Pinus%20halepensis | Pinus halepensis | Pinus halepensis, commonly known as the Aleppo pine, also known as the Jerusalem pine, is a pine native to the Mediterranean region. It was officially named by the botanist Philip Miller in his 1768 book The Gardener's Dictionary; he probably never went to Aleppo but mentions seeing large specimens at Goodwood in the g... | Biology and health sciences | Pinaceae | Plants |
1045267 | https://en.wikipedia.org/wiki/Pinus%20pinaster | Pinus pinaster | Pinus pinaster, the maritime pine or cluster pine, is a pine native to the south Atlantic Europe region and parts of the western Mediterranean. It is a hard, fast growing pine bearing small seeds with large wings.
Description
Pinus pinaster is a medium-size tree, reaching tall with a trunk diameter of up to , except... | Biology and health sciences | Pinaceae | Plants |
1045608 | https://en.wikipedia.org/wiki/Wright%20Flyer | Wright Flyer | The Wright Flyer (also known as the Kitty Hawk, Flyer I or the 1903 Flyer) made the first sustained flight by a manned heavier-than-air powered and controlled aircraft on December 17, 1903. Invented and flown by brothers Orville and Wilbur Wright, it marked the beginning of the pioneer era of aviation.
The aircraft is... | Technology | Specific aircraft_2 | null |
1045705 | https://en.wikipedia.org/wiki/Influenza%20vaccine | Influenza vaccine | Influenza vaccines, colloquially known as flu shots or the flu jab, are vaccines that protect against infection by influenza viruses. New versions of the vaccines are developed twice a year, as the influenza virus rapidly changes. While their effectiveness varies from year to year, most provide modest to high protectio... | Biology and health sciences | Vaccines | Health |
1047111 | https://en.wikipedia.org/wiki/HSAB%20theory | HSAB theory | HSAB is an acronym for "hard and soft (Lewis) acids and bases". HSAB is widely used in chemistry for explaining the stability of compounds, reaction mechanisms and pathways. It assigns the terms 'hard' or 'soft', and 'acid' or 'base' to chemical species. 'Hard' applies to species which are small, have high charge stat... | Physical sciences | Concepts | Chemistry |
1047190 | https://en.wikipedia.org/wiki/Sidneyia | Sidneyia | Sidneyia is an extinct marine arthropod known from fossils found from the Early to the Mid Cambrian of China and the Mid Cambrian Burgess Shale of British Columbia, Canada.
Description
Sidneyia inexpectans reached lengths of at least . The largest known specimen of S. minor is around long and wide, while the large... | Biology and health sciences | Fossil arthropods | Animals |
1047267 | https://en.wikipedia.org/wiki/Ottoia | Ottoia | Ottoia is a stem-group archaeopriapulid worm known from Cambrian fossils. Although priapulid-like worms from various Cambrian deposits are often referred to Ottoia on spurious grounds, the only clear Ottoia macrofossils come from the Burgess Shale of British Columbia, which was deposited . Microfossils extend the recor... | Biology and health sciences | Lophotrochozoa | Animals |
2259412 | https://en.wikipedia.org/wiki/Ilex%20aquifolium | Ilex aquifolium | Ilex aquifolium, the holly, common holly, English holly, European holly, or occasionally Christmas holly, is a species of flowering plant in the family Aquifoliaceae, native to western and southern Europe, northwest Africa, and southwest Asia. It is regarded as the type species of the genus Ilex, which by association i... | Biology and health sciences | Aquifoliales | Plants |
2260429 | https://en.wikipedia.org/wiki/Tail | Tail | The tail is the elongated section at the rear end of a bilaterian animal's body; in general, the term refers to a distinct, flexible appendage extending backwards from the midline of the torso. In vertebrate animals that evolved to lose their tails (e.g. frogs and hominid primates), the coccyx is the homologous vestigi... | Biology and health sciences | External anatomy and regions of the body | Biology |
2260546 | https://en.wikipedia.org/wiki/South%20Pole%20Telescope | South Pole Telescope | The South Pole Telescope (SPT) is a diameter telescope located at the Amundsen–Scott South Pole Station, Antarctica. The telescope is designed for observations in the microwave, millimeter-wave, and submillimeter-wave regions of the electromagnetic spectrum, with the particular design goal of measuring the faint, diff... | Technology | Ground-based observatories | null |
2260887 | https://en.wikipedia.org/wiki/Politics%20of%20climate%20change | Politics of climate change | The politics of climate change results from different perspectives on how to respond to climate change. Global warming is driven largely by the emissions of greenhouse gases due to human economic activity, especially the burning of fossil fuels, certain industries like cement and steel production, and land use for agri... | Physical sciences | Climate change | Earth science |
2261920 | https://en.wikipedia.org/wiki/Zinc%20acetate | Zinc acetate | Zinc acetate is a salt with the formula Zn(CH3CO2)2, which commonly occurs as the dihydrate Zn(CH3CO2)2·2H2O. Both the hydrate and the anhydrous forms are colorless solids that are used as dietary supplements. When used as a food additive, it has the E number E650.
Uses
Zinc acetate is a component of some medicines, e... | Physical sciences | Acetates | Chemistry |
2262550 | https://en.wikipedia.org/wiki/Thermodynamic%20limit | Thermodynamic limit | In statistical mechanics, the thermodynamic limit or macroscopic limit, of a system is the limit for a large number of particles (e.g., atoms or molecules) where the volume is taken to grow in proportion with the number of particles.
The thermodynamic limit is defined as the limit of a system with a large volume, wit... | Physical sciences | Thermodynamics | Physics |
2262599 | https://en.wikipedia.org/wiki/Cage | Cage | A cage is an enclosure often made of mesh, bars, or wires, used to confine, contain or protect something or someone. A cage can serve many purposes, including keeping an animal or person in captivity, capturing an animal or person, and displaying an animal at a zoo.
Construction
Since a cage is usually intended to hol... | Technology | Containers | null |
2263499 | https://en.wikipedia.org/wiki/Digital%20clock | Digital clock | A digital clock displays the time digitally (i.e. in numerals or other symbols), as opposed to an analogue clock.
Digital clocks are often associated with electronic drives, but the "digital" description refers only to the display, not to the drive mechanism. (Both analogue and digital clocks can be driven either mech... | Technology | Clocks | null |
2263753 | https://en.wikipedia.org/wiki/Borate%20mineral | Borate mineral | The Borate Minerals are minerals which contain a borate anion group. The borate (BO3) units may be polymerised similar to the SiO4 unit of the silicate mineral class. This results in B2O5, B3O6, B2O4 anions as well as more complex structures which include hydroxide or halogen anions. The [B(O,OH)4]− anion exists as wel... | Physical sciences | Minerals | Earth science |
2263803 | https://en.wikipedia.org/wiki/Phosphate%20mineral | Phosphate mineral | Phosphate minerals are minerals that contain the tetrahedrally coordinated phosphate () anion, sometimes with arsenate () and vanadate () substitutions, along with chloride (Cl−), fluoride (F−), and hydroxide (OH−) anions, that also fit into the crystal structure.
The phosphate class of minerals is a large and diverse... | Physical sciences | Minerals | Earth science |
13612447 | https://en.wikipedia.org/wiki/Repeating%20decimal | Repeating decimal | A repeating decimal or recurring decimal is a decimal representation of a number whose digits are eventually periodic (that is, after some place, the same sequence of digits is repeated forever); if this sequence consists only of zeros (that is if there is only a finite number of nonzero digits), the decimal is said to... | Mathematics | Basics | null |
8905895 | https://en.wikipedia.org/wiki/Freshwater%20pearl%20mussel | Freshwater pearl mussel | The freshwater pearl mussel (Margaritifera margaritifera) is an endangered species of freshwater mussel, an aquatic bivalve mollusc in the family Margaritiferidae.
Although the name "freshwater pearl mussel" is often used for this species, other freshwater mussel species (e.g. Margaritifera auricularia) can also creat... | Biology and health sciences | Bivalvia | Animals |
5669923 | https://en.wikipedia.org/wiki/Field%20research | Field research | Field research, field studies, or fieldwork is the collection of raw data outside a laboratory, library, or workplace setting. The approaches and methods used in field research vary across disciplines. For example, biologists who conduct field research may simply observe animals interacting with their environments, whe... | Physical sciences | Basics | null |
5670193 | https://en.wikipedia.org/wiki/Hipparion | Hipparion | Hipparion is an extinct genus of three-toed, medium-sized equine belonging to the extinct tribe Hipparionini, which lived about 10-5 million years ago. While the genus formerly included most hipparionines, the genus is now more narrowly defined as hipparionines from Eurasia spanning the Late Miocene. Hipparion was a mi... | Biology and health sciences | Equidae | Animals |
5671944 | https://en.wikipedia.org/wiki/Arp%20220 | Arp 220 | Arp 220 is the result of a collision between two galaxies which are now in the process of merging. It is the 220th object in Halton Arp's Atlas of Peculiar Galaxies.
Features
Arp 220 is the closest ultraluminous infrared galaxy (ULIRG) to Earth, at 250 million light years away. Its energy output was discovered by IRA... | Physical sciences | Notable galaxies | Astronomy |
5672031 | https://en.wikipedia.org/wiki/Orbit%20of%20the%20Moon | Orbit of the Moon | The Moon orbits Earth in the prograde direction and completes one revolution relative to the Vernal Equinox and the stars in about 27.32 days (a tropical month and sidereal month) and one revolution relative to the Sun in about 29.53 days (a synodic month). Earth and the Moon orbit about their barycentre (common centre... | Physical sciences | Solar System | Astronomy |
1611195 | https://en.wikipedia.org/wiki/Hand%20cannon | Hand cannon | The hand cannon ( or ), also known as the gonne or handgonne, is the first true firearm and the successor of the fire lance. It is the oldest type of small arms, as well as the most mechanically simple form of metal barrel firearms. Unlike matchlock firearms it requires direct manual external ignition through a touch h... | Technology | Firearms | null |
1613879 | https://en.wikipedia.org/wiki/Plastic%20bag | Plastic bag | A plastic bag, poly bag, or pouch is a type of container made of thin, flexible, plastic film, nonwoven fabric, or plastic textile. Plastic bags are used for containing and transporting goods such as foods, produce, powders, ice, magazines, chemicals, and waste. It is a common form of packaging.
Most plastic bags are... | Technology | Containers | null |
1614492 | https://en.wikipedia.org/wiki/Connectivity%20%28graph%20theory%29 | Connectivity (graph theory) | In mathematics and computer science, connectivity is one of the basic concepts of graph theory: it asks for the minimum number of elements (nodes or edges) that need to be removed to separate the remaining nodes into two or more isolated subgraphs. It is closely related to the theory of network flow problems. The conne... | Mathematics | Graph theory | null |
1614609 | https://en.wikipedia.org/wiki/Polarization%20in%20astronomy | Polarization in astronomy | Polarization of electromagnetic radiation is a useful tool for detecting various astronomical phenomenon. For example, energy can become polarized by passing through interstellar dust or by magnetic fields. Microwave energy from the primordial universe can be used to study the physics of that environment.
Stars
The po... | Physical sciences | Basics | Astronomy |
1615402 | https://en.wikipedia.org/wiki/Sulfonic%20acid | Sulfonic acid | In organic chemistry, sulfonic acid (or sulphonic acid) refers to a member of the class of organosulfur compounds with the general formula , where R is an organic alkyl or aryl group and the group a sulfonyl hydroxide. As a substituent, it is known as a sulfo group. A sulfonic acid can be thought of as sulfuric acid ... | Physical sciences | Specific acids | Chemistry |
620957 | https://en.wikipedia.org/wiki/Water%20dispenser | Water dispenser | A water dispenser, sometimes referred to as a water cooler (if used for cooling only), is a machine that dispenses and often also cools or heats up water with a refrigeration unit. It is commonly located near the restroom due to closer access to plumbing. A drain line is also provided from the water cooler into the sew... | Technology | Household appliances | null |
621267 | https://en.wikipedia.org/wiki/Gluteus%20maximus | Gluteus maximus | The gluteus maximus is the main extensor muscle of the hip in humans. It is the largest and outermost of the three gluteal muscles and makes up a large part of the shape and appearance of each side of the hips. It is the single largest muscle in the human body. Its thick fleshy mass, in a quadrilateral shape, forms the... | Biology and health sciences | Human anatomy | Health |
621379 | https://en.wikipedia.org/wiki/Oolite | Oolite | Oolite or oölite () is a sedimentary rock formed from ooids, spherical grains composed of concentric layers. Strictly, oolites consist of ooids of diameter 0.25–2 millimetres; rocks composed of ooids larger than 2 mm are called pisolites. The term oolith can refer to oolite or individual ooids.
Composition
Ooids are m... | Physical sciences | Sedimentary rocks | Earth science |
622003 | https://en.wikipedia.org/wiki/Miniature%20horse | Miniature horse | A miniature horse is a breed or type of horse characterised by its small size. Usually it has been bred to display in miniature the physical characteristics of a full-sized horse, but to be little over in height, or even less. Although such horses have the appearance of small horses, they are genetically much more sim... | Biology and health sciences | Horses | Animals |
622836 | https://en.wikipedia.org/wiki/Myosotis | Myosotis | Myosotis ( ) is a genus of flowering plants in the family Boraginaceae. The name comes from the Ancient Greek "mouse's ear", which the foliage is thought to resemble. In the Northern Hemisphere, they are colloquially known as forget-me-nots or scorpion grasses. Myosotis alpestris is the official flower of Alaska and ... | Biology and health sciences | Boraginales | Plants |
623099 | https://en.wikipedia.org/wiki/Switchblade | Switchblade | A switchblade (also known as switch knife, automatic knife, pushbutton knife, ejector knife, flick knife, gravity knife, flick blade, or spring knife) is a pocketknife with a sliding or pivoting blade contained in the handle which is extended automatically by a spring when a button, lever, or switch on the handle or bo... | Technology | Knives | null |
623118 | https://en.wikipedia.org/wiki/Ipomoea | Ipomoea | Ipomoea () is the largest genus in the plant family Convolvulaceae, with over 600 species. It is a large and diverse group, with common names including morning glory, water convolvulus or water spinach, sweet potato, bindweed, moonflower, etc. The genus occurs throughout the tropical and subtropical regions of the worl... | Biology and health sciences | Solanales | Plants |
623686 | https://en.wikipedia.org/wiki/Brain%E2%80%93computer%20interface | Brain–computer interface | A brain–computer interface (BCI), sometimes called a brain–machine interface (BMI), is a direct communication link between the brain's electrical activity and an external device, most commonly a computer or robotic limb. BCIs are often directed at researching, mapping, assisting, augmenting, or repairing human cognitiv... | Biology and health sciences | Biology basics | Biology |
623697 | https://en.wikipedia.org/wiki/Dytiscus | Dytiscus | Dytiscus ("little diver" based on Greek δυτικός, "able to dive" and the diminutive suffix -ίσκος) is a Holarctic genus of predaceous diving beetles that usually live in wetlands and ponds. There are 26 species in this genus distributed in Europe, Asia, North Africa and North and Central America. They are predators that... | Biology and health sciences | Beetles (Coleoptera) | Animals |
9588432 | https://en.wikipedia.org/wiki/Carya%20glabra | Carya glabra | Carya glabra, the pignut hickory, is a common, but not abundant species of hickory in the oak-hickory forest association in the Eastern United States and Canada. Other common names are pignut, sweet pignut, coast pignut hickory, smoothbark hickory, swamp hickory, and broom hickory. The pear-shaped nut ripens in Septemb... | Biology and health sciences | Fagales | Plants |
9593858 | https://en.wikipedia.org/wiki/Megarachne | Megarachne | {{Speciesbox
| fossil_range = Gzhelian
| image = Megarachne servinei.jpg
| image_alt = Cast of Megarachnes holotype specimen.
| image_caption = Cast of the holotype specimen of Megarachne exhibited at Royal Ontario Museum
| display_parents = 3
| genus = Megarachne
| parent_authority = Hünicken, 1980
| species = servine... | Biology and health sciences | Fossil arthropods | Animals |
4250553 | https://en.wikipedia.org/wiki/Gene | Gene | In biology, the word gene has two meanings. The Mendelian gene is a basic unit of heredity. The molecular gene is a sequence of nucleotides in DNA that is transcribed to produce a functional RNA. There are two types of molecular genes: protein-coding genes and non-coding genes. During gene expression (the synthesis of ... | Biology and health sciences | Biology | null |
4253054 | https://en.wikipedia.org/wiki/Ampere-hour | Ampere-hour | An ampere-hour or amp-hour (symbol: A⋅h or A h; often simplified as Ah) is a unit of electric charge, having dimensions of electric current multiplied by time, equal to the charge transferred by a steady current of one ampere flowing for one hour, or 3,600 coulombs.
The commonly seen milliampere-hour (symbol: mA⋅h, mA... | Physical sciences | Charge | Basics and measurement |
4254776 | https://en.wikipedia.org/wiki/Postterm%20pregnancy | Postterm pregnancy | Postterm pregnancy is when a woman has not yet delivered her baby after 42 weeks of gestation, two weeks beyond the typical 40-week duration of pregnancy. Postmature births carry risks for both the mother and the baby, including fetal malnutrition, meconium aspiration syndrome, and stillbirths. After the 42nd week of g... | Biology and health sciences | Human reproduction | Biology |
4255718 | https://en.wikipedia.org/wiki/Organosilicon%20chemistry | Organosilicon chemistry | Organosilicon chemistry is the study of organometallic compounds containing carbon–silicon bonds, to which they are called organosilicon compounds. Most organosilicon compounds are similar to the ordinary organic compounds, being colourless, flammable, hydrophobic, and stable to air. Silicon carbide is an inorganic com... | Physical sciences | Organic compounds | null |
4256725 | https://en.wikipedia.org/wiki/Archaeplastida | Archaeplastida | The Archaeplastida (or kingdom Plantae sensu lato "in a broad sense"; pronounced ) are a major group of eukaryotes, comprising the photoautotrophic red algae (Rhodophyta), green algae, land plants, and the minor group glaucophytes. It also includes the non-photosynthetic lineage Rhodelphidia, a predatorial (eukaryotrop... | Biology and health sciences | Bikonts | Plants |
3122976 | https://en.wikipedia.org/wiki/Thescelosaurus | Thescelosaurus | Thescelosaurus ( ) is a genus of ornithischian dinosaur that lived during the Late Cretaceous period in western North America. It was named and described in 1913 by the paleontologist Charles W. Gilmore; the type species is T. neglectus. Two other species, T. garbanii and T. assiniboiensis, were named in 1976 and 2011,... | Biology and health sciences | Ornitischians | Animals |
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