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44312 | https://en.wikipedia.org/wiki/Invention | Invention | An invention is a unique or novel device, method, composition, idea or process. An invention may be an improvement upon a machine, product, or process for increasing efficiency or lowering cost. It may also be an entirely new concept. If an idea is unique enough either as a stand-alone invention or as a significant im... | Technology | Technology: General | null |
44344 | https://en.wikipedia.org/wiki/Clover | Clover | Clovers, also called trefoils, are plants of the genus Trifolium (), consisting of about 300 species of flowering plants in the legume family Fabaceae originating in Europe. The genus has a cosmopolitan distribution with the highest diversity in the temperate Northern Hemisphere, but many species also occur in South Am... | Biology and health sciences | Fabales | Plants |
44346 | https://en.wikipedia.org/wiki/Shallot | Shallot | The shallot is a cultivar group of the onion. Until 2010, the (French red) shallot was classified as a separate species, Allium ascalonicum. The taxon was synonymized with Allium cepa (the common onion) in 2010, as the difference was too small to justify a separate species.
As part of the onion genus Allium, its close... | Biology and health sciences | Root vegetables | Plants |
44363 | https://en.wikipedia.org/wiki/Wien%27s%20displacement%20law | Wien's displacement law | In physics, Wien's displacement law states that the black-body radiation curve for different temperatures will peak at different wavelengths that are inversely proportional to the temperature. The shift of that peak is a direct consequence of the Planck radiation law, which describes the spectral brightness or intensit... | Physical sciences | Thermodynamics | Physics |
44364 | https://en.wikipedia.org/wiki/Black%20body | Black body | A black body or blackbody is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence. The radiation emitted by a black body in thermal equilibrium with its environment is called black-body radiation. The name "black body" is given because it absorbs ... | Physical sciences | Thermodynamics | Physics |
44365 | https://en.wikipedia.org/wiki/Typewriter | Typewriter | A typewriter is a mechanical or electromechanical machine for typing characters. Typically, a typewriter has an array of keys, and each one causes a different single character to be produced on paper by striking an inked ribbon selectively against the paper with a type element. Thereby, the machine produces a legible w... | Technology | Media and communication | null |
44371 | https://en.wikipedia.org/wiki/Triton%20%28moon%29 | Triton (moon) | Triton is the largest natural satellite of the planet Neptune. It is the only moon of Neptune massive enough to be rounded under its own gravity and hosts a thin, hazy atmosphere. Triton orbits Neptune in a retrograde orbit—revolving in the opposite direction to the parent planet's rotation—the only large moon in the S... | Physical sciences | Solar System | null |
44401 | https://en.wikipedia.org/wiki/Brown%20dwarf | Brown dwarf | Brown dwarfs are substellar objects that have more mass than the biggest gas giant planets, but less than the least massive main-sequence stars. Their mass is approximately 13 to 80 times that of Jupiter ()not big enough to sustain nuclear fusion of ordinary hydrogen (1H) into helium in their cores, but massive enough... | Physical sciences | Stellar astronomy | null |
44410 | https://en.wikipedia.org/wiki/Conjunctivitis | Conjunctivitis | Conjunctivitis, also known as pink eye or Madras eye, is inflammation of the conjunctiva and the inner surface of the eyelid. It makes the eye appear pink or reddish. Pain, burning, scratchiness, or itchiness may occur. The affected eye may have increased tears or be "stuck shut" in the morning. Swelling of the sclera ... | Biology and health sciences | Infectious diseases by site | Health |
44412 | https://en.wikipedia.org/wiki/Sedimentary%20rock | Sedimentary rock | Sedimentary rocks are types of rock that are formed by the accumulation or deposition of sediments, ie. mineral or organic particles, at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles to settle in place. The particles that form a sedimentary rock ... | Physical sciences | Petrology | null |
44424 | https://en.wikipedia.org/wiki/Metamorphic%20rock | Metamorphic rock | Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock (protolith) is subjected to temperatures greater than and, often, elevated pressure of or more, causing profound physical or chemical changes. During this process, the rock remains... | Physical sciences | Petrology | null |
44430 | https://en.wikipedia.org/wiki/Glacis | Glacis | A glacis (, ) in military engineering is an artificial slope as part of a medieval castle or in early modern fortresses. They may be constructed of earth as a temporary structure or of stone in more permanent structure. More generally, a glacis is any slope, natural or artificial, which fulfils the above requirements. ... | Technology | Fortification | null |
44469 | https://en.wikipedia.org/wiki/Pluto | Pluto | Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun. It is the largest known trans-Neptunian object by volume, by a small margin, but is less massive than ... | Physical sciences | Solar System | null |
44474 | https://en.wikipedia.org/wiki/Saturn | Saturn | Saturn is the sixth planet from the Sun and the second largest in the Solar System, after Jupiter. It is a gas giant, with an average radius of about nine times that of Earth. It has an eighth the average density of Earth, but is over 95 times more massive. Even though Saturn is almost as big as Jupiter, Saturn has les... | Physical sciences | Astronomy | null |
44475 | https://en.wikipedia.org/wiki/Uranus | Uranus | Uranus is the seventh planet from the Sun. It is a gaseous cyan-coloured ice giant. Most of the planet is made of water, ammonia, and methane in a supercritical phase of matter, which astronomy calls "ice" or volatiles. The planet's atmosphere has a complex layered cloud structure and has the lowest minimum temperature... | Physical sciences | Astronomy | null |
44481 | https://en.wikipedia.org/wiki/Tuff | Tuff | Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as tuffaceous (for example, tuffaceous sand... | Physical sciences | Petrology | null |
44495 | https://en.wikipedia.org/wiki/Linear%20motor | Linear motor | A linear motor is an electric motor that has had its stator and rotor "unrolled", thus, instead of producing a torque (rotation), it produces a linear force along its length. However, linear motors are not necessarily straight. Characteristically, a linear motor's active section has ends, whereas more conventional moto... | Technology | Engines | null |
44545 | https://en.wikipedia.org/wiki/Till | Till | Till or glacial till is unsorted glacial sediment.
Till is derived from the erosion and entrainment of material by the moving ice of a glacier. It is deposited some distance down-ice to form terminal, lateral, medial and ground moraines.
Till is classified into primary deposits, laid down directly by glaciers, and se... | Physical sciences | Sedimentology | Earth science |
44568 | https://en.wikipedia.org/wiki/Herbivore | Herbivore | A herbivore is an animal anatomically and physiologically evolved to feed on plants, especially upon vascular tissues such as foliage, fruits or seeds, as the main component of its diet. These more broadly also encompass animals that eat non-vascular autotrophs such as mosses, algae and lichens, but do not include thos... | Biology and health sciences | Ethology | null |
44578 | https://en.wikipedia.org/wiki/Big%20O%20notation | Big O notation | Big O notation is a mathematical notation that describes the limiting behavior of a function when the argument tends towards a particular value or infinity. Big O is a member of a family of notations invented by German mathematicians Paul Bachmann, Edmund Landau, and others, collectively called Bachmann–Landau notation... | Mathematics | Algorithms | null |
44593 | https://en.wikipedia.org/wiki/Rib | Rib | In vertebrate anatomy, ribs () are the long curved bones which form the rib cage, part of the axial skeleton. In most tetrapods, ribs surround the thoracic cavity, enabling the lungs to expand and thus facilitate breathing by expanding the thoracic cavity. They serve to protect the lungs, heart, and other vital organs ... | Biology and health sciences | Skeletal system | Biology |
44596 | https://en.wikipedia.org/wiki/Positronium | Positronium | Positronium (Ps) is a system consisting of an electron and its anti-particle, a positron, bound together into an exotic atom, specifically an onium. Unlike hydrogen, the system has no protons. The system is unstable: the two particles annihilate each other to predominantly produce two or three gamma-rays, depending o... | Physical sciences | Atomic physics | Physics |
44599 | https://en.wikipedia.org/wiki/Chalcedony | Chalcedony | Chalcedony ( or ) is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic. Chalcedony's standard chemical structure (based on the chemical structure o... | Physical sciences | Silicate minerals | Earth science |
44600 | https://en.wikipedia.org/wiki/Carnelian | Carnelian | Carnelian (also spelled cornelian) is a brownish-red mineral commonly used as a semiprecious stone. Similar to carnelian is sard, which is generally harder and darker; the difference is not rigidly defined, and the two names are often used interchangeably. Both carnelian and sard are varieties of the silica mineral cha... | Physical sciences | Silicate minerals | Earth science |
44603 | https://en.wikipedia.org/wiki/Calcite | Calcite | Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3). It is a very common mineral, particularly as a component of limestone. Calcite defines hardness 3 on the Mohs scale of mineral hardness, based on scratch hardness comparison. Large calcite crystals are used in optical equipment, ... | Physical sciences | Minerals | Earth science |
44633 | https://en.wikipedia.org/wiki/Ultramarine | Ultramarine | Ultramarine is a deep blue color pigment which was originally made by grinding lapis lazuli into a powder. Its lengthy grinding and washing process makes the natural pigment quite valuable—roughly ten times more expensive than the stone it comes from and as expensive as gold.
The name ultramarine comes from the Latin ... | Physical sciences | Colors | Physics |
44652 | https://en.wikipedia.org/wiki/Lazurite | Lazurite | Lazurite, old name Azure spar is a tectosilicate mineral with sulfate, sulfur and chloride with formula . It is a feldspathoid and a member of the sodalite group. Lazurite crystallizes in the isometric system although well‐formed crystals are rare. It is usually massive and forms the bulk of the gemstone lapis lazuli.
... | Physical sciences | Silicate minerals | Earth science |
44668 | https://en.wikipedia.org/wiki/Porcupine | Porcupine | Porcupines are large rodents with coats of sharp spines, or quills, that protect them against predation. The term covers two families of animals: the Old World porcupines of the family Hystricidae, and the New World porcupines of the family Erethizontidae. Both families belong to the infraorder Hystricognathi within t... | Biology and health sciences | Rodents | null |
44682 | https://en.wikipedia.org/wiki/CMYK%20color%20model | CMYK color model | The CMYK color model (also known as process color, or four color) is a subtractive color model, based on the CMY color model, used in color printing, and is also used to describe the printing process itself. The abbreviation CMYK refers to the four ink plates used: cyan, magenta, yellow, and key (most often black).
Th... | Physical sciences | Basics_7 | null |
44700 | https://en.wikipedia.org/wiki/Leprosy | Leprosy | Leprosy, also known as Hansen's disease (HD), is a long-term infection by the bacteria Mycobacterium leprae or Mycobacterium lepromatosis. Infection can lead to damage of the nerves, respiratory tract, skin, and eyes. This nerve damage may result in a lack of ability to feel pain, which can lead to the loss of parts of... | Biology and health sciences | Infectious disease | null |
44723 | https://en.wikipedia.org/wiki/Printing | Printing | Printing is a process for mass reproducing text and images using a master form or template. The earliest non-paper products involving printing include cylinder seals and objects such as the Cyrus Cylinder and the Cylinders of Nabonidus. The earliest known form of printing evolved from ink rubbings made on paper or clot... | Technology | Media and communication | null |
44731 | https://en.wikipedia.org/wiki/Calcium%20carbonate | Calcium carbonate | Calcium carbonate is a chemical compound with the chemical formula . It is a common substance found in rocks as the minerals calcite and aragonite, most notably in chalk and limestone, eggshells, gastropod shells, shellfish skeletons and pearls. Materials containing much calcium carbonate or resembling it are described... | Physical sciences | Salts | null |
44734 | https://en.wikipedia.org/wiki/Chalk | Chalk | Chalk is a soft, white, porous, sedimentary carbonate rock. It is a form of limestone composed of the mineral calcite and originally formed deep under the sea by the compression of microscopic plankton that had settled to the sea floor. Chalk is common throughout Western Europe, where deposits underlie parts of France,... | Physical sciences | Sedimentary rocks | Earth science |
44758 | https://en.wikipedia.org/wiki/Goldbach%27s%20conjecture | Goldbach's conjecture | Goldbach's conjecture is one of the oldest and best-known unsolved problems in number theory and all of mathematics. It states that every even natural number greater than 2 is the sum of two prime numbers.
The conjecture has been shown to hold for all integers less than but remains unproven despite considerable effor... | Mathematics | Sums and products | null |
44790 | https://en.wikipedia.org/wiki/Luminosity | Luminosity | Luminosity is an absolute measure of radiated electromagnetic energy per unit time, and is synonymous with the radiant power emitted by a light-emitting object. In astronomy, luminosity is the total amount of electromagnetic energy emitted per unit of time by a star, galaxy, or other astronomical objects.
In SI units,... | Physical sciences | Observational astronomy | null |
44883 | https://en.wikipedia.org/wiki/Welding | Welding | Welding is a fabrication process that joins materials, usually metals or thermoplastics, primarily by using high temperature to melt the parts together and allow them to cool, causing fusion. Common alternative methods include solvent welding (of thermoplastics) using chemicals to melt materials being bonded without he... | Technology | Metallurgy | null |
44905 | https://en.wikipedia.org/wiki/Asthma | Asthma | Asthma is a common long-term inflammatory disease of the airways of the lungs. Asthma occurs when allergens, pollen, dust, or other particles, are inhaled into the lungs, causing the bronchioles to constrict and produce mucus, which then restricts oxygen flow to the alveoli. It is characterized by variable and recurrin... | Biology and health sciences | Illness and injury | null |
44928 | https://en.wikipedia.org/wiki/Mahogany | Mahogany | Mahogany is a straight-grained, reddish-brown timber of three tropical hardwood species of the genus Swietenia, indigenous to the Americas and part of the pantropical chinaberry family, Meliaceae. Mahogany is used commercially for a wide variety of goods, due to its coloring and durable nature. It is naturally found wi... | Biology and health sciences | Sapindales | null |
317350 | https://en.wikipedia.org/wiki/Common%20quail | Common quail | The common quail (Coturnix coturnix), or European quail, is a small ground-nesting game bird in the pheasant family Phasianidae. It is mainly migratory, breeding in the western Palearctic and wintering in Africa and southern India.
With its characteristic call of three repeated chirps (repeated three times in quick su... | Biology and health sciences | Galliformes | null |
317380 | https://en.wikipedia.org/wiki/Menthol | Menthol | Menthol is an organic compound, specifically a monoterpenoid, that occurs naturally in the oils of several plants in the mint family, such as corn mint and peppermint. It is a white or clear waxy crystalline substance that is solid at room temperature and melts slightly above. The main form of menthol occurring in natu... | Physical sciences | Terpenes and terpenoids | Chemistry |
317625 | https://en.wikipedia.org/wiki/Image%20scanner | Image scanner | An image scanner (often abbreviated to just scanner) is a device that optically scans images, printed text, handwriting, or an object and converts it to a digital image. The most common type of scanner used in the home and the office is the flatbed scanner, where the document is placed on a glass bed. A sheetfed scanne... | Technology | Media and communication | null |
317695 | https://en.wikipedia.org/wiki/Moulting | Moulting | In biology, moulting (British English), or molting (American English), also known as sloughing, shedding, or in many invertebrates, ecdysis, is a process by which an animal casts off parts of its body to serve some beneficial purpose, either at specific times of the year, or at specific points in its life cycle.
In me... | Biology and health sciences | Animal ontogeny | null |
317900 | https://en.wikipedia.org/wiki/Clothes%20dryer | Clothes dryer | A clothes dryer (tumble dryer, drying machine, or simply dryer) is a powered household appliance that is used to remove moisture from a load of clothing, bedding and other textiles, usually after they are washed in the washing machine.
Many dryers consist of a rotating drum called a "tumbler" through which heated air ... | Technology | Household appliances | null |
318020 | https://en.wikipedia.org/wiki/Megamouth%20shark | Megamouth shark | The megamouth shark (Megachasma pelagios) is a species of deepwater shark. Rarely seen by humans, it measures around long and is the smallest of the three extant filter-feeding sharks alongside the relatively larger whale shark and basking shark. According to Sharkman's World Organization a total of 286 specimens have... | Biology and health sciences | Sharks | Animals |
318037 | https://en.wikipedia.org/wiki/Lamniformes | Lamniformes | The Lamniformes (, from Greek lamna "fish of prey") are an order of sharks commonly known as mackerel sharks (which may also refer specifically to the family Lamnidae). It includes some of the most familiar species of sharks, such as the great white as well as less familiar ones, such as the goblin shark and megamouth... | Biology and health sciences | Sharks | Animals |
318051 | https://en.wikipedia.org/wiki/Law%20of%20mass%20action | Law of mass action | In chemistry, the law of mass action is the proposition that the rate of a chemical reaction is directly proportional to the product of the activities or concentrations of the reactants. It explains and predicts behaviors of solutions in dynamic equilibrium. Specifically, it implies that for a chemical reaction mixture... | Physical sciences | Kinetics | Chemistry |
318069 | https://en.wikipedia.org/wiki/Goblin%20shark | Goblin shark | The goblin shark (Mitsukurina owstoni) is a rare species of deep-sea shark. Sometimes called a "living fossil", it is the only extant representative of the family Mitsukurinidae, a lineage some 125 million years old. This pink-skinned animal has a distinctive profile with an elongated, flat snout, and highly protrusibl... | Biology and health sciences | Sharks | Animals |
318200 | https://en.wikipedia.org/wiki/Giraffidae | Giraffidae | The Giraffidae are a family of ruminant artiodactyl mammals that share a recent common ancestor with deer and bovids. This family, once a diverse group spread throughout Eurasia and Africa, presently comprises only two extant genera, the giraffe (between one and eight, usually four, species of Giraffa, depending on tax... | Biology and health sciences | Giraffidae | Animals |
318215 | https://en.wikipedia.org/wiki/African%20penguin | African penguin | The African penguin (Spheniscus demersus), also known as Cape penguin or South African penguin, is a species of penguin confined to southern African waters. It is the only penguin found in the Old World. Like all penguins, it is flightless, with a streamlined body and wings stiffened and flattened into flippers for a m... | Biology and health sciences | Sphenisciformes | Animals |
318262 | https://en.wikipedia.org/wiki/Pont%20Neuf | Pont Neuf | The Pont Neuf (, "New Bridge") is the oldest standing bridge across the river Seine in Paris, France. It stands by the western (downstream) point of the Île de la Cité, the island in the middle of the river that was, between 250 and 225 BCE, the birthplace of Paris, then known as Lutetia and, during the medieval period... | Technology | Bridges | null |
318265 | https://en.wikipedia.org/wiki/Moschidae | Moschidae | Moschidae is a family of pecoran even-toed ungulates, containing the musk deer (Moschus) and its extinct relatives. They are characterized by long "saber teeth" instead of horns, antlers or ossicones, modest size (Moschus only reaches ; other taxa were even smaller) and a lack of facial glands. While various Oligocene ... | Biology and health sciences | Other artiodactyla | Animals |
318270 | https://en.wikipedia.org/wiki/Musk%20deer | Musk deer | Musk deer can refer to any one, or all eight, of the species that make up Moschus, the only extant genus of the family Moschidae. Despite being commonly called deer, they are not true deer belonging to the family Cervidae, but rather their family is closely related to Bovidae, the group that contains antelopes, bovines... | Biology and health sciences | Other artiodactyla | Animals |
318319 | https://en.wikipedia.org/wiki/Chevrotain | Chevrotain | Chevrotains, or mouse-deer, are diminutive, even-toed ungulates that make up the family Tragulidae, and are the only living members of the infraorder Tragulina. The 10 extant species are placed in three genera, but several species also are known only from fossils. The extant species are found in forests in South and So... | Biology and health sciences | Other artiodactyla | Animals |
318378 | https://en.wikipedia.org/wiki/Crane%20%28machine%29 | Crane (machine) | A crane is a machine used to move materials both vertically and horizontally, utilizing a system of a boom, hoist, wire ropes or chains, and sheaves for lifting and relocating heavy objects within the swing of its boom. The device uses one or more simple machines, such as the lever and pulley, to create mechanical adva... | Technology | Basics_8 | null |
318498 | https://en.wikipedia.org/wiki/Green%20Bank%20Telescope | Green Bank Telescope | The Robert C. Byrd Green Bank Telescope (GBT) in Green Bank, West Virginia, US is the world's largest fully steerable radio telescope, surpassing the Effelsberg 100-m Radio Telescope in Germany. The Green Bank site was part of the National Radio Astronomy Observatory (NRAO) until September 30, 2016. Since October 1, 20... | Technology | Ground-based observatories | null |
318563 | https://en.wikipedia.org/wiki/Foxhound | Foxhound | A foxhound is a type of large hunting hound bred for strong hunting instincts, a keen sense of smell, and their barking, energy, drive, and speed. In fox hunting, the foxhound's namesake, packs of foxhounds track quarry, followed—usually on horseback—by the hunters, sometimes for several miles at a stretch; moreover, f... | Biology and health sciences | Dogs | Animals |
318577 | https://en.wikipedia.org/wiki/Cavendish%20experiment | Cavendish experiment | The Cavendish experiment, performed in 1797–1798 by English scientist Henry Cavendish, was the first experiment to measure the force of gravity between masses in the laboratory and the first to yield accurate values for the gravitational constant. Because of the unit conventions then in use, the gravitational constant ... | Physical sciences | Classical mechanics | Physics |
318669 | https://en.wikipedia.org/wiki/Schizosaccharomyces%20pombe | Schizosaccharomyces pombe | Schizosaccharomyces pombe, also called "fission yeast", is a species of yeast used in traditional brewing and as a model organism in molecular and cell biology. It is a unicellular eukaryote, whose cells are rod-shaped. Cells typically measure 3 to 4 micrometres in diameter and 7 to 14 micrometres in length. Its genome... | Biology and health sciences | Basics | Plants |
318779 | https://en.wikipedia.org/wiki/Embryophyte | Embryophyte | The embryophytes () are a clade of plants, also known as Embryophyta () or land plants. They are the most familiar group of photoautotrophs that make up the vegetation on Earth's dry lands and wetlands. Embryophytes have a common ancestor with green algae, having emerged within the Phragmoplastophyta clade of freshwate... | Biology and health sciences | Embryophytes (Land plants) except vascular plants | Plants |
318869 | https://en.wikipedia.org/wiki/Iceland%20spar | Iceland spar | Iceland spar, formerly called Iceland crystal ( , ) and also called optical calcite, is a transparent variety of calcite, or crystallized calcium carbonate, originally brought from Iceland, and used in demonstrating the polarization of light.
Formation and composition
Iceland spar is a colourless, transparent variet... | Physical sciences | Minerals | Earth science |
318895 | https://en.wikipedia.org/wiki/Deodorant | Deodorant | A deodorant is a substance applied to the body to prevent or mask body odor caused by bacterial breakdown of perspiration, for example in the armpits, groin, or feet. A subclass of deodorants, called antiperspirants, prevents sweating itself, typically by blocking sweat glands. Antiperspirants are used on a wider range... | Biology and health sciences | Hygiene products | Health |
318980 | https://en.wikipedia.org/wiki/Endorheic%20basin | Endorheic basin | An endorheic basin ( ; also endoreic basin and endorreic basin) is a drainage basin that normally retains water and allows no outflow to other external bodies of water (e.g. rivers and oceans); instead, the water drainage flows into permanent and seasonal lakes and swamps that equilibrate through evaporation. Endorheic... | Physical sciences | Hydrology | Earth science |
319122 | https://en.wikipedia.org/wiki/Pinwheel%20Galaxy | Pinwheel Galaxy | The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on, unbarred, and counterclockwise spiral galaxy located from Earth in the constellation Ursa Major. It was discovered by Pierre Méchain in 1781 and was communicated that year to Charles Messier, who verified its position for inclusion in the ... | Physical sciences | Notable galaxies | null |
319126 | https://en.wikipedia.org/wiki/Lenticular%20galaxy | Lenticular galaxy | A lenticular galaxy (denoted S0) is a type of galaxy intermediate between an elliptical (denoted E) and a spiral galaxy in galaxy morphological classification schemes. It contains a large-scale disc but does not have large-scale spiral arms. Lenticular galaxies are disc galaxies that have used up or lost most of their... | Physical sciences | Galaxy morphological classification | null |
319141 | https://en.wikipedia.org/wiki/Eagle%20Nebula | Eagle Nebula | The Eagle Nebula (catalogued as Messier 16 or M16, and as NGC 6611, and also known as the Star Queen Nebula) is a young open cluster of stars in the constellation Serpens, discovered by Jean-Philippe de Cheseaux in 1745–46. Both the "Eagle" and the "Star Queen" refer to visual impressions of the dark silhouette near th... | Physical sciences | Notable nebulae | null |
319150 | https://en.wikipedia.org/wiki/Messier%204 | Messier 4 | Messier 4 or M4 (also known as NGC 6121 or the Spider Globular Cluster) is a globular cluster in the constellation of Scorpius. It was discovered by Philippe Loys de Chéseaux in 1745 and catalogued by Charles Messier in 1764. It was the first globular cluster in which individual stars were resolved.
Visibility
M4 is c... | Physical sciences | Notable star clusters | Astronomy |
319153 | https://en.wikipedia.org/wiki/Messier%2083 | Messier 83 | Messier 83 or M83, also known as the Southern Pinwheel Galaxy and NGC 5236, is a barred spiral galaxy approximately 15 million light-years away in the constellation borders of Hydra and Centaurus. Nicolas-Louis de Lacaille discovered M83 on 17 February 1752 at the Cape of Good Hope. Charles Messier added it to his cata... | Physical sciences | Notable galaxies | Astronomy |
319168 | https://en.wikipedia.org/wiki/Shield%20volcano | Shield volcano | A shield volcano is a type of volcano named for its low profile, resembling a shield lying on the ground. It is formed by the eruption of highly fluid (low viscosity) lava, which travels farther and forms thinner flows than the more viscous lava erupted from a stratovolcano. Repeated eruptions result in the steady accu... | Physical sciences | Volcanology | Earth science |
319342 | https://en.wikipedia.org/wiki/Microfilament | Microfilament | Microfilaments, also called actin filaments, are protein filaments in the cytoplasm of eukaryotic cells that form part of the cytoskeleton. They are primarily composed of polymers of actin, but are modified by and interact with numerous other proteins in the cell. Microfilaments are usually about 7 nm in diameter and m... | Biology and health sciences | Cell parts | Biology |
319522 | https://en.wikipedia.org/wiki/Cattle%20egret | Cattle egret | The cattle egret (formerly genus Bubulcus) is a cosmopolitan clade of heron (family Ardeidae) in the genus Ardea found in the tropics, subtropics, and warm-temperate zones. According to the IOC bird list, it contains two species, the western cattle egret and the eastern cattle egret, although some authorities regard th... | Biology and health sciences | Pelecanimorphae | Animals |
319558 | https://en.wikipedia.org/wiki/Ocean%20liner | Ocean liner | An ocean liner is a type of passenger ship primarily used for transportation across seas or oceans. Ocean liners may also carry cargo or mail, and may sometimes be used for other purposes (such as for pleasure cruises or as hospital ships). The Queen Mary 2 is the only ocean liner still in service to this day, serving ... | Technology | Naval transport | null |
319610 | https://en.wikipedia.org/wiki/Biological%20life%20cycle | Biological life cycle | In biology, a biological life cycle (or just life cycle when the biological context is clear) is a series of stages of the life of an organism, that begins as a zygote, often in an egg, and concludes as an adult that reproduces, producing an offspring in the form of a new zygote which then itself goes through the same ... | Biology and health sciences | Ecology | Biology |
319653 | https://en.wikipedia.org/wiki/Bidet | Bidet | A bidet ( or ) is a bowl or receptacle designed to be sat upon in order to wash a person's genitalia, perineum, inner buttocks, and anus. The modern variety has a plumbed-in water supply and a drainage opening, and is thus a plumbing fixture subject to local hygiene regulations. The bidet is designed to promote persona... | Technology | Hydraulics and pneumatics | null |
319712 | https://en.wikipedia.org/wiki/Well-founded%20relation | Well-founded relation | In mathematics, a binary relation is called well-founded (or wellfounded or foundational) on a set or, more generally, a class if every non-empty subset has a minimal element with respect to ; that is, there exists an such that, for every , one does not have . In other words, a relation is well-founded if:
Some au... | Mathematics | Order theory | null |
319834 | https://en.wikipedia.org/wiki/Rutherford%20scattering%20experiments | Rutherford scattering experiments | The Rutherford scattering experiments were a landmark series of experiments by which scientists learned that every atom has a nucleus where all of its positive charge and most of its mass is concentrated. They deduced this after measuring how an alpha particle beam is scattered when it strikes a thin metal foil. The ... | Physical sciences | Atomic physics | null |
320217 | https://en.wikipedia.org/wiki/Substation | Substation | A substation is a part of an electrical generation, transmission, and distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. Between the generating station and consumer, electric power may flow through several substations at different vo... | Technology | Electricity transmission and distribution | null |
1506024 | https://en.wikipedia.org/wiki/Crystal%20violet | Crystal violet | Crystal violet or gentian violet, also known as methyl violet 10B or hexamethyl pararosaniline chloride, is a triarylmethane dye used as a histological stain and in Gram's method of classifying bacteria. Crystal violet has antibacterial, antifungal, and anthelmintic (vermicide) properties and was formerly important as ... | Physical sciences | Organic salts | Chemistry |
1506087 | https://en.wikipedia.org/wiki/Epigenome | Epigenome | In biology, the epigenome of an organism is the collection of chemical changes to its DNA and histone proteins that affects when, where, and how the DNA is expressed; these changes can be passed down to an organism's offspring via transgenerational epigenetic inheritance. Changes to the epigenome can result in changes ... | Biology and health sciences | Genetics | Biology |
1508434 | https://en.wikipedia.org/wiki/Coplanarity | Coplanarity | In geometry, a set of points in space are coplanar if there exists a geometric plane that contains them all. For example, three points are always coplanar, and if the points are distinct and non-collinear, the plane they determine is unique. However, a set of four or more distinct points will, in general, not lie in a ... | Mathematics | Two-dimensional space | null |
1509289 | https://en.wikipedia.org/wiki/Magnetostatics | Magnetostatics | Magnetostatics is the study of magnetic fields in systems where the currents are steady (not changing with time). It is the magnetic analogue of electrostatics, where the charges are stationary. The magnetization need not be static; the equations of magnetostatics can be used to predict fast magnetic switching events t... | Physical sciences | Magnetism | null |
1509614 | https://en.wikipedia.org/wiki/Black%20turtle%20bean | Black turtle bean | The black turtle bean is a small, shiny variety of the common bean (Phaseolus vulgaris) especially popular in Latin American cuisine, though it can also be found in the Cajun and Creole cuisines of south Louisiana. Like all varieties of the common bean, it is native to the Americas, but has been introduced around the w... | Biology and health sciences | Pulses | Plants |
1510249 | https://en.wikipedia.org/wiki/Bering%20Strait%20crossing | Bering Strait crossing | A Bering Strait crossing is a hypothetical bridge or tunnel that would span the relatively narrow and shallow Bering Strait between the Chukotka Peninsula in Russia and the Seward Peninsula in the U.S. state of Alaska. The crossing would provide a connection linking the Americas and Afro-Eurasia.
With the two Diomede ... | Technology | Multi-modal crossings | null |
1511050 | https://en.wikipedia.org/wiki/Picea%20glauca | Picea glauca | Picea glauca (Moench) Voss., the white spruce, is a species of spruce native to the northern temperate and boreal forests in Canada and United States, North America.
Picea glauca is native from central Alaska all through the east, across western and southern/central Canada to the Avalon Peninsula in Newfoundland, Que... | Biology and health sciences | Pinaceae | Plants |
1511315 | https://en.wikipedia.org/wiki/Picea%20engelmannii | Picea engelmannii | Picea engelmannii, with the common names Engelmann spruce, white spruce, mountain spruce, and silver spruce, is a species of spruce native to western North America. Highly prized for producing distinctive tone wood for acoustic guitars and other instruments, it is mostly a high-elevation mountain tree but also appears ... | Biology and health sciences | Pinaceae | Plants |
14411152 | https://en.wikipedia.org/wiki/Astrapotheria | Astrapotheria | Astrapotheria is an extinct order of South American and Antarctic hoofed mammals that existed from the late Paleocene to the Middle Miocene, . Astrapotheres were large, rhinoceros-like animals and have been called one of the most bizarre orders of mammals with an enigmatic evolutionary history.
The taxonomy of this or... | Biology and health sciences | Mammals: General | Animals |
4086303 | https://en.wikipedia.org/wiki/Eczema%20herpeticum | Eczema herpeticum | Eczema herpeticum is a rare but severe and contagious disseminated infection that generally occurs at sites of skin damage produced by, for example, atopic dermatitis, burns, long-term usage of topical steroids or eczema. It is also known as Kaposi varicelliform eruption, Pustulosis varioliformis acute and Kaposi–Juliu... | Biology and health sciences | Viral diseases | Health |
4093158 | https://en.wikipedia.org/wiki/Strix%20%28bird%29 | Strix (bird) | Strix is a genus of owls in the typical owl family (Strigidae), one of the two generally accepted living families of owls, with the other being Tytonidae. Common names are earless owls or wood owls, though they are not the only owls without ear tufts, and "wood owl" is also used as a more generic name for forest-dwelli... | Biology and health sciences | Strigiformes | Animals |
15923603 | https://en.wikipedia.org/wiki/Oil%20tanker | Oil tanker | An oil tanker, also known as a petroleum tanker, is a ship designed for the bulk transport of oil or its products. There are two basic types of oil tankers: crude tankers and product tankers. Crude tankers move large quantities of unrefined crude oil from its point of extraction to refineries. Product tankers, generall... | Technology | Naval transport | null |
15925628 | https://en.wikipedia.org/wiki/Hepatitis%20B | Hepatitis B | Hepatitis B is an infectious disease caused by the hepatitis B virus (HBV) that affects the liver; it is a type of viral hepatitis. It can cause both acute and chronic infection.
Many people have no symptoms during an initial infection. For others, symptoms may appear 30 to 180 days after becoming infected and can inc... | Biology and health sciences | Viral diseases | Health |
15929223 | https://en.wikipedia.org/wiki/Pig%20farming | Pig farming | Pig farming, pork farming, or hog farming is the raising and breeding of domestic pigs as livestock, and is a branch of animal husbandry. Pigs are farmed principally for food (e.g. pork: bacon, ham, gammon) and skins.
Pigs are amenable to many different styles of farming: intensive commercial units, commercial free ra... | Technology | Animal husbandry | null |
5457188 | https://en.wikipedia.org/wiki/Parasitoid%20wasp | Parasitoid wasp | Parasitoid wasps are a large group of hymenopteran superfamilies, with all but the wood wasps (Orussoidea) being in the wasp-waisted Apocrita. As parasitoids, they lay their eggs on or in the bodies of other arthropods, sooner or later causing the death of these hosts. Different species specialise in hosts from differe... | Biology and health sciences | Hymenoptera | Animals |
2155942 | https://en.wikipedia.org/wiki/Harvester%20ant | Harvester ant | Harvester ant is a common name for any of the species or genera of ants that collect seeds (called seed predation), or mushrooms as in the case of Euprenolepis procera, which are stored in the nest in communal chambers called granaries. They are also referred to as agricultural ants. Seed harvesting by some desert ant... | Biology and health sciences | Hymenoptera | Animals |
2156142 | https://en.wikipedia.org/wiki/Australorp | Australorp | The Australorp is an Australian breed of dual-purpose utility chicken. It derives from the British Black Orpington, and was selectively bred for egg-laying performance; some hens lay more than 300 eggs per year. It achieved world-wide popularity in the 1920s after the breed broke numerous world records for number of eg... | Biology and health sciences | Chickens | Animals |
2158298 | https://en.wikipedia.org/wiki/Visual%20impairment | Visual impairment | Visual or vision impairment (VI or VIP) is the partial or total inability of visual perception. In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment, visual impairment may cause the individual difficulties with normal daily tasks, including reading and walking. The terms low ... | Biology and health sciences | Disability | null |
2158876 | https://en.wikipedia.org/wiki/Port%20of%20Hamburg | Port of Hamburg | The Port of Hamburg (, ) is a seaport on the river Elbe in Hamburg, Germany, from its mouth on the North Sea.
Known as Germany's "Gateway to the World" (), it is the country's largest seaport by volume. In terms of TEU throughput, Hamburg is the third-busiest port in Europe (after Rotterdam and Antwerp) and 15th-larg... | Technology | Specific piers and ports | null |
2159778 | https://en.wikipedia.org/wiki/Sexual%20and%20reproductive%20health | Sexual and reproductive health | Sexual and reproductive health (SRH) is a field of research, health care, and social activism that explores the health of an individual's reproductive system and sexual well-being during all stages of their life. Sexual and reproductive health is more commonly defined as sexual and reproductive health and rights, to en... | Biology and health sciences | Fields of medicine | null |
11737869 | https://en.wikipedia.org/wiki/Snow%20pea | Snow pea | The snow pea is an edible-pod pea with flat pods and thin pod walls. It is eaten whole, with both the seeds and the pod, while still unripened.
Names
The common name snow pea seems to be a misnomer as the planting season of this pea is no earlier than that of other peas. Another common name, Chinese pea, is probably ... | Biology and health sciences | Pulses | Plants |
11738757 | https://en.wikipedia.org/wiki/Peak%20demand | Peak demand | Peak demand on an electrical grid is the highest electrical power demand that has occurred over a specified time period (Gönen 2008). Peak demand is typically characterized as annual, daily or seasonal and has the unit of power.
Peak demand, peak load or on-peak are terms used in energy demand management describing a p... | Technology | Concepts | null |
13256745 | https://en.wikipedia.org/wiki/Planetary%20nebula%20luminosity%20function | Planetary nebula luminosity function | Planetary nebula luminosity function (PNLF) is a secondary distance indicator used in astronomy. It makes use of the [O III] λ5007 forbidden line found in all planetary nebula (PNe) which are members of the old stellar populations (Population II).
It can be used to determine distances to both spiral and elliptical ga... | Physical sciences | Basics | Astronomy |
569684 | https://en.wikipedia.org/wiki/Utahraptor | Utahraptor | Utahraptor (meaning "Utah's predator") is a genus of large dromaeosaurid (a group of feathered carnivorous theropods) dinosaur that lived during the Early Cretaceous period from around 135 to 130 million years ago in what is now the United States. The genus was described in 1993 by American paleontologist James Kirklan... | Biology and health sciences | Theropods | Animals |
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