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8340209 | https://en.wikipedia.org/wiki/Alternative%20fuel%20vehicle | Alternative fuel vehicle | An alternative fuel vehicle is a motor vehicle that runs on alternative fuel rather than traditional petroleum-based fossil fuels such as gasoline, petrodiesel or liquefied petroleum gas (autogas). The term typically refers to internal combustion engine vehicles or fuel cell vehicles that utilize synthetic renewable fu... | Technology | Basics_7 | null |
25309794 | https://en.wikipedia.org/wiki/Lycopodium%20powder | Lycopodium powder | Lycopodium powder is a yellow-tan dust-like powder, consisting of the dry spores of clubmoss plants, or various fern relatives. When it is mixed with air, the spores are highly flammable and are used to create dust explosions as theatrical special effects. The powder was traditionally used in physics experiments to dem... | Biology and health sciences | Lycophytes | Plants |
23962701 | https://en.wikipedia.org/wiki/Tropical%20monsoon%20climate | Tropical monsoon climate | An area of tropical monsoon climate (occasionally known as a sub-equatorial, tropical wet climate or a tropical monsoon and trade-wind littoral climate) is a tropical climate subtype that corresponds to the Köppen climate classification category Am. Tropical monsoon climates have monthly mean temperatures above in eve... | Physical sciences | Climates | Earth science |
1280893 | https://en.wikipedia.org/wiki/Cooking%20apple | Cooking apple | A cooking apple or culinary apple is an apple that is used primarily for cooking, as opposed to a dessert apple, which is eaten raw. Cooking apples are generally larger, and can be tarter than dessert varieties. Some varieties have a firm flesh that does not break down much when cooked. Culinary varieties with a high a... | Biology and health sciences | Pomes | Plants |
1282836 | https://en.wikipedia.org/wiki/Gigantopithecus | Gigantopithecus | Gigantopithecus ( ; ) is an extinct genus of ape that lived in southern China from 2 million to approximately 300,000 to 200,000 years ago during the Early to Middle Pleistocene, represented by one species, Gigantopithecus blacki. Potential identifications have also been made in Thailand, Vietnam, and Indonesia. The fi... | Biology and health sciences | Apes | Animals |
1283013 | https://en.wikipedia.org/wiki/Spalax | Spalax | Spalax is a genus of rodent in the family Spalacidae, subfamily Spalacinae (blind mole-rats). It is one of two extant genera in the subfamily Spalacinae, alongside Nannospalax.
Species in this genus are found in eastern Europe and western & central Asia. They are completely blind and have a subterranean lifestyle.
Ta... | Biology and health sciences | Rodents | Animals |
1283638 | https://en.wikipedia.org/wiki/Canopus | Canopus | Canopus is the brightest star in the southern constellation of Carina and the second-brightest star in the night sky. It is also designated α Carinae, which is romanized (transliterated) to Alpha Carinae. With a visual apparent magnitude of −0.74, it is outshone only by Sirius.
Located around from the Sun, Canopus is... | Physical sciences | Notable stars | null |
1283865 | https://en.wikipedia.org/wiki/Hyperbolic%20triangle | Hyperbolic triangle | In hyperbolic geometry, a hyperbolic triangle is a triangle in the hyperbolic plane. It consists of three line segments called sides or edges and three points called angles or vertices.
Just as in the Euclidean case, three points of a hyperbolic space of an arbitrary dimension always lie on the same plane. Hence plana... | Mathematics | Non-Euclidean geometry | null |
1284973 | https://en.wikipedia.org/wiki/Nile%20crocodile | Nile crocodile | The Nile crocodile (Crocodylus niloticus) is a large crocodilian native to freshwater habitats in Africa, where it is present in 26 countries. It is widely distributed in sub-Saharan Africa, occurring mostly in the eastern, southern, and central regions of the continent, and lives in different types of aquatic environm... | Biology and health sciences | Crocodilia | Animals |
827692 | https://en.wikipedia.org/wiki/Transmission%20tower | Transmission tower | A transmission tower (also electricity pylon, hydro tower, or pylon) is a tall structure, usually a lattice tower made of steel that is used to support an overhead power line. In electrical grids, transmission towers carry high-voltage transmission lines that transport bulk electric power from generating stations to el... | Technology | Electricity transmission and distribution | null |
827736 | https://en.wikipedia.org/wiki/Shield%20%28geology%29 | Shield (geology) | A shield is a large area of exposed Precambrian crystalline igneous and high-grade metamorphic rocks that form tectonically stable areas. These rocks are older than 570 million years and sometimes date back to around 2 to 3.5 billion years. They have been little affected by tectonic events following the end of the Prec... | Physical sciences | Tectonics | Earth science |
827792 | https://en.wikipedia.org/wiki/Rare%20Earth%20hypothesis | Rare Earth hypothesis | In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the origin of life and the evolution of biological complexity, such as sexually reproducing, multicellular organisms on Earth, and subsequently human intelligence, required an improbable combination of astrophysical and geological events and... | Physical sciences | Planetary science | Astronomy |
828436 | https://en.wikipedia.org/wiki/QR%20code | QR code | A QR code, quick-response code, is a type of two-dimensional matrix barcode invented in 1994 by Masahiro Hara of Japanese company Denso Wave for labelling automobile parts. It features black squares on a white background with fiducial markers, readable by imaging devices like cameras, and processed using Reed–Solomon e... | Technology | Data storage and memory | null |
829159 | https://en.wikipedia.org/wiki/Tokyo%20Bay%20Aqua-Line | Tokyo Bay Aqua-Line | The , also known as the Trans-Tokyo Bay Expressway, is an expressway that is mainly made up of a bridge–tunnel combination across Tokyo Bay in Japan. It connects the city of Kawasaki in Kanagawa Prefecture with the city of Kisarazu in Chiba Prefecture, and forms part of National Route 409. With an overall length of 23... | Technology | Multi-modal crossings | null |
831170 | https://en.wikipedia.org/wiki/Sloan%20Digital%20Sky%20Survey | Sloan Digital Sky Survey | The Sloan Digital Sky Survey or SDSS is a major multi-spectral imaging and spectroscopic redshift survey using a dedicated 2.5-m wide-angle optical telescope at Apache Point Observatory in New Mexico, United States. The project began in 2000 and was named after the Alfred P. Sloan Foundation, which contributed signific... | Physical sciences | Surveys and Catalogs | Astronomy |
831650 | https://en.wikipedia.org/wiki/Anodizing | Anodizing | Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts.
The process is called anodizing because the part to be treated forms the anode electrode of an electrolytic cell. Anodizing increases resistance to corrosion and wear, and provides ... | Technology | Metallurgy | null |
832128 | https://en.wikipedia.org/wiki/Liquefied%20natural%20gas | Liquefied natural gas | Liquefied natural gas (LNG) is natural gas (predominantly methane, CH4, with some mixture of ethane, C2H6) that has been cooled down to liquid form for ease and safety of non-pressurized storage or transport. It takes up about 1/600th the volume of natural gas in the gaseous state at standard conditions for temperature... | Technology | Fuel | null |
832314 | https://en.wikipedia.org/wiki/Clinic | Clinic | A clinic (or outpatient clinic or ambulatory care clinic) is a health facility that is primarily focused on the care of outpatients. Clinics can be privately operated or publicly managed and funded. They typically cover the primary care needs of populations in local communities, in contrast to larger hospitals which of... | Biology and health sciences | Health facilities | Health |
832482 | https://en.wikipedia.org/wiki/Rotten%20Tomatoes | Rotten Tomatoes | Rotten Tomatoes is an American review-aggregation website for film and television. The company was launched in August 1998 by three undergraduate students at the University of California, Berkeley: Senh Duong, Patrick Y. Lee, and Stephen Wang. Although the name "Rotten Tomatoes" connects to the practice of audiences th... | Technology | Utility | null |
833499 | https://en.wikipedia.org/wiki/Prestressed%20concrete | Prestressed concrete | Prestressed concrete is a form of concrete used in construction. It is substantially "prestressed" (compressed) during production, in a manner that strengthens it against tensile forces which will exist when in service. It was patented by Eugène Freyssinet in 1928.
This compression is produced by the tensioning of hi... | Technology | Building materials | null |
835031 | https://en.wikipedia.org/wiki/Riverboat | Riverboat | A riverboat is a watercraft designed for inland navigation on lakes, rivers, and artificial waterways. They are generally equipped and outfitted as work boats in one of the carrying trades, for freight or people transport, including luxury units constructed for entertainment enterprises, such as lake or harbour tour bo... | Technology | Maritime transport | null |
18697521 | https://en.wikipedia.org/wiki/Toucan | Toucan | Toucans (, ) are Neotropical birds in the family Ramphastidae. The Ramphastidae are most closely related to the Toucan barbets. They are brightly marked and have large, often colorful bills. The family includes five genera and over 40 different species.
Toucans are arboreal and typically lay two to four white eggs in ... | Biology and health sciences | Piciformes | null |
18698592 | https://en.wikipedia.org/wiki/Haloform%20reaction | Haloform reaction | In chemistry, the haloform reaction (also referred to as the Lieben haloform reaction) is a chemical reaction in which a haloform (, where X is a halogen) is produced by the exhaustive halogenation of an acetyl group (, where R can be either a hydrogen atom, an alkyl or an aryl group), in the presence of a base. The re... | Physical sciences | Organic reactions | Chemistry |
3600408 | https://en.wikipedia.org/wiki/Volume%20fraction | Volume fraction | In chemistry and fluid mechanics, the volume fraction is defined as the volume of a constituent Vi divided by the volume of all constituents of the mixture V prior to mixing:
Being dimensionless, its unit is 1; it is expressed as a number, e.g., 0.18. It is the same concept as volume percent (vol%) except that the la... | Physical sciences | Ratio | Basics and measurement |
132729 | https://en.wikipedia.org/wiki/Tuple | Tuple | In mathematics, a tuple is a finite sequence or ordered list of numbers or, more generally, mathematical objects, which are called the elements of the tuple. An -tuple is a tuple of elements, where is a non-negative integer. There is only one 0-tuple, called the empty tuple. A 1-tuple and a 2-tuple are commonly call... | Mathematics | Set theory | null |
132784 | https://en.wikipedia.org/wiki/Cast%20iron | Cast iron | Cast iron is a class of iron–carbon alloys with a carbon content of more than 2% and silicon content around 1–3%. Its usefulness derives from its relatively low melting temperature. The alloying elements determine the form in which its carbon appears: white cast iron has its carbon combined into an iron carbide named c... | Physical sciences | Specific alloys | null |
133017 | https://en.wikipedia.org/wiki/Second%20law%20of%20thermodynamics | Second law of thermodynamics | The second law of thermodynamics is a physical law based on universal empirical observation concerning heat and energy interconversions. A simple statement of the law is that heat always flows spontaneously from hotter to colder regions of matter (or 'downhill' in terms of the temperature gradient). Another statement i... | Physical sciences | Thermodynamics | Physics |
22459054 | https://en.wikipedia.org/wiki/Pachypasa | Pachypasa | Pachypasa is a genus of moths in the family Lasiocampidae. The genus was erected by Francis Walker in 1855.
Species
Pachypasa otus (Drury, 1773) Italy, Greece, Asia Minor, Iraq, Iran
Pachypasa limosa (de Villiers, 1827) southwestern Europe, northern Africa
Pachypasa denticula (Bethune-Baker, 1908) Zimbabwe
Pachypasa d... | Biology and health sciences | Lepidoptera | Animals |
12991932 | https://en.wikipedia.org/wiki/Level%20staff | Level staff | A level staff, also called levelling rod, is a graduated wooden or aluminium rod, used with a levelling instrument to determine the difference in height between points or heights of points above a vertical datum.
When used for stadiametric rangefinding, the level staff is called a stadia rod.
Rod construction and mate... | Technology | Surveying tools | null |
4865141 | https://en.wikipedia.org/wiki/Flood%20control%20in%20the%20Netherlands | Flood control in the Netherlands | Flood control is an important issue for the Netherlands, as due to its low elevation, approximately two thirds of its area is vulnerable to flooding, while the country is densely populated. Natural sand dunes and constructed dikes, dams, and floodgates provide defense against storm surges from the sea. River dikes prev... | Technology | Hydraulic infrastructure | null |
4870290 | https://en.wikipedia.org/wiki/Complex%20logarithm | Complex logarithm | In mathematics, a complex logarithm is a generalization of the natural logarithm to nonzero complex numbers. The term refers to one of the following, which are strongly related:
A complex logarithm of a nonzero complex number , defined to be any complex number for which . Such a number is denoted by . If is given... | Mathematics | Specific functions | null |
2647057 | https://en.wikipedia.org/wiki/Trinomial | Trinomial | In elementary algebra, a trinomial is a polynomial consisting of three terms or monomials.
Examples of trinomial expressions
with variables
with variables
with variables
, the quadratic polynomial in standard form with variables.
with variables, nonnegative integers and any constants.
where is var... | Mathematics | Basics | null |
2648952 | https://en.wikipedia.org/wiki/Charonia | Charonia | Charonia is a genus of very large sea snail, commonly known as Triton's trumpet or Triton snail. They are marine gastropod mollusks in the monotypic family Charoniidae. They are one of the few natural predators of the crown-of-thorns starfish.
Etymology
The common name "Triton's trumpet" is derived from the Greek god... | Biology and health sciences | Gastropods | Animals |
2649115 | https://en.wikipedia.org/wiki/Submarine%20volcano | Submarine volcano | Submarine volcanoes are underwater vents or fissures in the Earth's surface from which magma can erupt. Many submarine volcanoes are located near areas of tectonic plate formation, known as mid-ocean ridges. The volcanoes at mid-ocean ridges alone are estimated to account for 75% of the magma output on Earth. Although ... | Physical sciences | Volcanology | Earth science |
2649805 | https://en.wikipedia.org/wiki/Aepycamelus | Aepycamelus | Aepycamelus is an extinct genus of camelids that lived during the Miocene 20.6–4.9 million years ago, existing for about . Its name is derived from the Homeric Greek , "high and steep" and κάμηλος – "camel"; thus, "high camel"; alticamelus in Latin.
Aepycamelus spp. walked on their toes only. Unlike earlier species of... | Biology and health sciences | Camelidae | Animals |
2649947 | https://en.wikipedia.org/wiki/Economic%20analysis%20of%20climate%20change | Economic analysis of climate change | An economic analysis of climate change uses economic tools and models to calculate the magnitude and distribution of damages caused by climate change. It can also give guidance for the best policies for mitigation and adaptation to climate change from an economic perspective. There are many economic models and framewor... | Physical sciences | Climate change | Earth science |
2650394 | https://en.wikipedia.org/wiki/Respiratory%20rate | Respiratory rate | The respiratory rate is the rate at which breathing occurs; it is set and controlled by the respiratory center of the brain. A person's respiratory rate is usually measured in breaths per minute.
Measurement
The respiratory rate in humans is measured by counting the number of breaths for one minute through counting h... | Biology and health sciences | Diagnostics | Health |
19832108 | https://en.wikipedia.org/wiki/Diplostraca | Diplostraca | The Diplostraca or Cladocera, commonly known as water fleas, is a superorder of small, mostly freshwater crustaceans, most of which feed on microscopic chunks of organic matter, though some forms are predatory.
Over 1000 species have been recognised so far, with many more undescribed. The oldest fossils of diplostraca... | Biology and health sciences | Crustaceans | Animals |
19835580 | https://en.wikipedia.org/wiki/Nice%20model | Nice model | In astronomy, the Nice () model is a scenario for the dynamical evolution of the Solar System. It is named for the location of the Côte d'Azur Observatory—where it was initially developed in 2005—in Nice, France. It proposes the migration of the giant planets from an initial compact configuration into their present pos... | Physical sciences | Solar System | Astronomy |
23974535 | https://en.wikipedia.org/wiki/Omnivore | Omnivore | An omnivore () is an animal that regularly consumes significant quantities of both plant and animal matter. Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize the nutrients and energy of the sources absorbed. Often, they have the ability ... | Biology and health sciences | Ethology | Biology |
6373390 | https://en.wikipedia.org/wiki/Saddle | Saddle | A saddle is a supportive structure for a rider of an animal, fastened to an animal's back by a girth. The most common type is equestrian. However, specialized saddles have been created for oxen, camels and other animals. It is not known precisely when riders first began to use some sort of padding or protection, but a... | Technology | Animal-powered transport | null |
1908016 | https://en.wikipedia.org/wiki/Einstein%20solid | Einstein solid | The Einstein solid is a model of a crystalline solid that contains a large number of independent three-dimensional quantum harmonic oscillators of the same frequency. The independence assumption is relaxed in the Debye model.
While the model provides qualitative agreement with experimental data, especially for the hig... | Physical sciences | Basics_2 | Physics |
1908365 | https://en.wikipedia.org/wiki/Neon%20lighting | Neon lighting | Neon lighting consists of brightly glowing, electrified glass tubes or bulbs that contain rarefied neon or other gases. Neon lights are a type of cold cathode gas-discharge light. A neon tube is a sealed glass tube with a metal electrode at each end, filled with one of a number of gases at low pressure. A high poten... | Technology | Lighting | null |
1908527 | https://en.wikipedia.org/wiki/Nuclear%20magnetic%20resonance%20spectroscopy | Nuclear magnetic resonance spectroscopy | Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique based on re-orientation of atomic nuclei with non-zero nuclear spins in an external magnetic field. This re-orientation occurs with absorption of electromagnetic radiat... | Physical sciences | Nuclear physics | Physics |
1908699 | https://en.wikipedia.org/wiki/Lepospondyli | Lepospondyli | Lepospondyli is a diverse taxon of early tetrapods. With the exception of one late-surviving lepospondyl from the Late Permian of Morocco (Diplocaulus minimus), lepospondyls lived from the Visean stage of the Early Carboniferous to the Early Permian and were geographically restricted to what is now Europe and North Ame... | Biology and health sciences | Prehistoric amphibians | Animals |
1909222 | https://en.wikipedia.org/wiki/Cultivator | Cultivator | A cultivator (also known as a rotavator) is a piece of agricultural equipment used for secondary tillage. One sense of the name refers to frames with teeth (also called shanks) that pierce the soil as they are dragged through it linearly. Another sense of the name also refers to machines that use the rotary motion of d... | Technology | Farm and garden machinery | null |
1911087 | https://en.wikipedia.org/wiki/Madagascar%20hissing%20cockroach | Madagascar hissing cockroach | The Madagascar hissing cockroach (Gromphadorhina portentosa), also known as the hissing cockroach or simply hisser, is one of the largest species of cockroach, reaching at maturity. They are native to the island of Madagascar, which is off the African mainland, where they are commonly found in rotting logs. It is one ... | Biology and health sciences | Cockroaches & Termites (Blattodea) | Animals |
1911942 | https://en.wikipedia.org/wiki/Brachypelma%20hamorii | Brachypelma hamorii | Brachypelma hamorii is a vulnerable species of tarantula found in Mexico. It has been confused with B. smithi; both have been called Mexican redknee tarantulas. Many earlier sources referring to B. smithi either do not distinguish between the two species or relate to B. hamorii. B. hamorii is a terrestrial tarantula na... | Biology and health sciences | Spiders | Animals |
1912220 | https://en.wikipedia.org/wiki/Annona%20squamosa | Annona squamosa | Annona squamosa is a small, well-branched tree or shrub from the family Annonaceae that bears edible fruits called sugar apples or sweetsops. It tolerates a tropical lowland climate better than its relatives Annona reticulata and Annona cherimola (whose fruits often share the same name) helping make it the most widely ... | Biology and health sciences | Tropical and tropical-like fruit | Plants |
1912301 | https://en.wikipedia.org/wiki/Humulus%20lupulus | Humulus lupulus | Humulus lupulus, the common hop or hops, is a species of flowering plant in the hemp family, Cannabaceae. It is a perennial, herbaceous climbing plant which sends up new shoots in early spring and dies back to a cold-hardy rhizome in autumn. It is dioecious (having separate male and female plants) and native to West As... | Biology and health sciences | Rosales | Plants |
1912874 | https://en.wikipedia.org/wiki/Integrating%20factor | Integrating factor | In mathematics, an integrating factor is a function that is chosen to facilitate the solving of a given equation involving differentials. It is commonly used to solve non-exact ordinary differential equations, but is also used within multivariable calculus when multiplying through by an integrating factor allows an ine... | Mathematics | Differential equations | null |
1912904 | https://en.wikipedia.org/wiki/Areca%20catechu | Areca catechu | Areca catechu is a species of palm native to the Philippines cultivated for areca nuts. It was carried widely through the tropics by the Austronesian migrations and trade since at least 1500 BCE due to its use in betel nut chewing. It is widespread in cultivation and is considered naturalized in Malaysia, Indonesia, Ne... | Biology and health sciences | Arecales (inc. Palms) | Plants |
1913920 | https://en.wikipedia.org/wiki/Vanessa%20cardui | Vanessa cardui | Vanessa cardui is the most widespread of all butterfly species. It is commonly called the painted lady, or formerly in North America the cosmopolitan.
Description
Distribution
V. cardui is one of the most widespread of all butterflies, found on every continent except Antarctica and South America. In Australia, V. ca... | Biology and health sciences | Lepidoptera | Animals |
1913997 | https://en.wikipedia.org/wiki/Okra | Okra | Okra (, ), Abelmoschus esculentus, known in some English-speaking countries as lady's fingers, is a flowering plant in the mallow family native to East Africa. Cultivated in tropical, subtropical, and warm temperate regions around the world for its edible green seed pods, okra is featured in the cuisines of many countr... | Biology and health sciences | Others | null |
1914137 | https://en.wikipedia.org/wiki/Cynodon | Cynodon | Cynodon is a genus of plants in the grass family. It is native to warm temperate to tropical regions of the Old World, as well as being cultivated and naturalized in the New World and on many oceanic islands.
Taxonomy
The genus name comes from Greek words meaning "dog-tooth". The genus as a whole as well as its specie... | Biology and health sciences | Poales | Plants |
18701436 | https://en.wikipedia.org/wiki/Tumblr | Tumblr | Tumblr (pronounced "tumbler") is a microblogging and social networking website founded by David Karp in 2007 and currently owned by American company Automattic. The service allows users to post multimedia and other content to a short-form blog.
History
Beginnings (2006–2012)
Development of Tumblr began in 2006 durin... | Technology | Social network and blogging | null |
18707721 | https://en.wikipedia.org/wiki/Head%20lice%20infestation | Head lice infestation | Head lice infestation, also known as pediculosis capitis, is the infection of the head hair and scalp by the head louse (Pediculus humanus capitis). Itching from lice bites is common. During a person's first infection, the itch may not develop for up to six weeks. If a person is infected again, symptoms may begin much ... | Biology and health sciences | Helminthic diseases and infestations | Health |
18707980 | https://en.wikipedia.org/wiki/Baudet%20du%20Poitou | Baudet du Poitou | The Baudet du Poitou, also called the Poitevin or Poitou donkey, is a French breed of donkey. It is one of the largest breeds, and jacks (donkey stallions) were bred to mares of the Poitevin horse breed to produce Poitevin mules, which were formerly in worldwide demand for agricultural and other work. The Baudet has a ... | Biology and health sciences | Donkeys | Animals |
18710520 | https://en.wikipedia.org/wiki/Intergalactic%20dust | Intergalactic dust | Intergalactic dust is cosmic dust in between galaxies in intergalactic space. Evidence for intergalactic dust has been suggested as early as 1949, and study of it grew throughout the late 20th century. There are large variations in the distribution of intergalactic dust. Dust may affect intergalactic distance measureme... | Physical sciences | Basics_2 | Astronomy |
22462464 | https://en.wikipedia.org/wiki/Banpo%20Bridge | Banpo Bridge | The Banpo Bridge () is a major bridge for vehicular traffic over the Han River in central Seoul, South Korea. It is a double-decked bridge, and is above the pedestrian Jamsu Bridge.
The bridge is a popular tourist attraction, and is known for its daily Moonlight Rainbow Fountain and light shows between April and Octob... | Technology | Bridges | null |
133345 | https://en.wikipedia.org/wiki/Dead%20reckoning | Dead reckoning | In navigation, dead reckoning is the process of calculating the current position of a moving object by using a previously determined position, or fix, and incorporating estimates of speed, heading (or direction or course), and elapsed time. The corresponding term in biology, to describe the processes by which animals u... | Technology | Navigation | null |
133496 | https://en.wikipedia.org/wiki/Parallelogram | Parallelogram | In Euclidean geometry, a parallelogram is a simple (non-self-intersecting) quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure. The congruence of opposite sides and opposite angles is a direct... | Mathematics | Two-dimensional space | null |
133824 | https://en.wikipedia.org/wiki/Oyster | Oyster | Oyster is the common name for a number of different families of salt-water bivalve molluscs that live in marine or brackish habitats. In some species, the valves are highly calcified, and many are somewhat irregular in shape. Many, but not all oysters, are in the superfamily Ostreoidea.
Some species of oyster are comm... | Biology and health sciences | Mollusks | null |
133923 | https://en.wikipedia.org/wiki/Chisel | Chisel | A chisel is a wedged hand tool with a characteristically shaped cutting edge on the end of its blade, for carving or cutting a hard material (e.g. wood, stone, or metal). The tool can be used by hand, struck with a mallet, or applied with mechanical power. The handle and blade of some types of chisel are made of metal ... | Technology | Hand tools | null |
3609705 | https://en.wikipedia.org/wiki/Star%20chart | Star chart | A star chart is a celestial map of the night sky with astronomical objects laid out on a grid system. They are used to identify and locate constellations, stars, nebulae, galaxies, and planets. They have been used for human navigation since time immemorial. Note that a star chart differs from an astronomical catalog, w... | Technology | Astronomical technology | null |
13001588 | https://en.wikipedia.org/wiki/Animal%20consciousness | Animal consciousness | Animal consciousness, or animal awareness, is the quality or state of self-awareness within an animal, or of being aware of an external object or something within itself. In humans, consciousness has been defined as: sentience, awareness, subjectivity, qualia, the ability to experience or to feel, wakefulness, having a... | Biology and health sciences | Basics_2 | Biology |
491658 | https://en.wikipedia.org/wiki/Heavy%20equipment | Heavy equipment | Heavy equipment, heavy machinery, earthmovers, construction vehicles, or construction equipment, refers to heavy-duty vehicles specially designed to execute construction tasks, most frequently involving earthwork operations or other large construction tasks. Heavy equipment usually comprises five equipment systems: the... | Technology | Specific-purpose transportation | null |
491851 | https://en.wikipedia.org/wiki/Radio%20receiver | Radio receiver | In radio communications, a radio receiver, also known as a receiver, a wireless, or simply a radio, is an electronic device that receives radio waves and converts the information carried by them to a usable form. It is used with an antenna. The antenna intercepts radio waves (electromagnetic waves of radio frequency) a... | Technology | Broadcasting | null |
491868 | https://en.wikipedia.org/wiki/Dragonet | Dragonet | Dragonets are small, percomorph, marine fish of the diverse family Callionymidae (from the Greek kallis, "beautiful" and , "name") found mainly in the tropical waters of the western Indo-Pacific. They are benthic organisms, spending most of their time near the sandy bottoms, at a depth of roughly two hundred meters. Th... | Biology and health sciences | Acanthomorpha | Animals |
491936 | https://en.wikipedia.org/wiki/Pilates | Pilates | Pilates (; ) is a type of mind-body exercise developed in the early 20th century by German physical trainer Joseph Pilates, after whom it was named. Pilates called his method "Contrology". It is practiced worldwide, especially in developed countries such as Australia, Canada, Germany, South Korea, New Zealand, the Unit... | Biology and health sciences | Physical fitness | Health |
491962 | https://en.wikipedia.org/wiki/Respiration%20%28physiology%29 | Respiration (physiology) | In physiology, respiration is the transport of oxygen from the outside environment to the cells within tissues, and the removal of carbon dioxide in the opposite direction to the environment by a respiratory system.
The physiological definition of respiration differs from the biochemical definition, which refers to a ... | Biology and health sciences | Basics_3 | null |
491986 | https://en.wikipedia.org/wiki/Phaseolus%20vulgaris | Phaseolus vulgaris | Phaseolus vulgaris, the common bean, is a herbaceous annual plant grown worldwide for its edible dry seeds or green, unripe pods. Its leaf is also occasionally used as a vegetable and the straw as fodder. Its botanical classification, along with other Phaseolus species, is as a member of the legume family, Fabaceae. Li... | Biology and health sciences | Fabales | null |
492012 | https://en.wikipedia.org/wiki/C4%20carbon%20fixation | C4 carbon fixation | carbon fixation or the Hatch–Slack pathway is one of three known photosynthetic processes of carbon fixation in plants. It owes the names to the 1960s discovery by Marshall Davidson Hatch and Charles Roger Slack.
fixation is an addition to the ancestral and more common carbon fixation. The main carboxylating enzyme ... | Biology and health sciences | Metabolic processes | Biology |
492015 | https://en.wikipedia.org/wiki/Multiple%20rocket%20launcher | Multiple rocket launcher | A multiple rocket launcher (MRL) or multiple launch rocket system (MLRS) is a type of rocket artillery system that contains multiple launchers which are fixed to a single platform, and shoots its rocket ordnance in a fashion similar to a volley gun. Rockets are self-propelled in flight and have different capabilities t... | Technology | Missiles | null |
492039 | https://en.wikipedia.org/wiki/Archosaur | Archosaur | Archosauria () or archosaurs () is a clade of diapsid sauropsid tetrapods, with birds and crocodilians being the only extant representatives. Although broadly classified as reptiles, which traditionally exclude birds, the cladistic sense of the term includes all living and extinct relatives of birds and crocodilians su... | Biology and health sciences | General classifications_2 | Animals |
492052 | https://en.wikipedia.org/wiki/Presbyopia | Presbyopia | Presbyopia is a physiological insufficiency of optical accommodation associated with the aging of the eye; it results in progressively worsening ability to focus clearly on close objects. Also known as age-related farsightedness (or as age-related long sight in the UK), it affects many adults over the age of 40. A comm... | Biology and health sciences | Disabilities | Health |
492177 | https://en.wikipedia.org/wiki/Sizing | Sizing | Sizing or size is a substance that is applied to, or incorporated into, other materials—especially papers and textiles—to act as a protective filler or glaze. Sizing is used in papermaking and textile manufacturing to change the absorption and wear characteristics of those materials.
Sizing is used for oil-based surfa... | Technology | Materials | null |
492445 | https://en.wikipedia.org/wiki/Compass%20%28drawing%20tool%29 | Compass (drawing tool) | A compass, also commonly known as a pair of compasses, is a technical drawing instrument that can be used for inscribing circles or arcs. As dividers, it can also be used as a tool to mark out distances, in particular, on maps. Compasses can be used for mathematics, drafting, navigation and other purposes.
Prior to co... | Technology | Artist's and drafting tools | null |
493399 | https://en.wikipedia.org/wiki/Loudness | Loudness | In acoustics, loudness is the subjective perception of sound pressure. More formally, it is defined as the "attribute of auditory sensation in terms of which sounds can be ordered on a scale extending from quiet to loud". The relation of physical attributes of sound to perceived loudness consists of physical, physiolog... | Physical sciences | Waves | Physics |
493465 | https://en.wikipedia.org/wiki/North%20American%20plate | North American plate | The North American plate is a tectonic plate containing most of North America, Cuba, the Bahamas, extreme northeastern Asia, and parts of Iceland and the Azores. With an area of , it is the Earth's second largest tectonic plate, behind the Pacific plate (which borders the plate to the west).
It extends eastward to the... | Physical sciences | Tectonic plates | Earth science |
493760 | https://en.wikipedia.org/wiki/Ice%20sheet | Ice sheet | In glaciology, an ice sheet, also known as a continental glacier, is a mass of glacial ice that covers surrounding terrain and is greater than . The only current ice sheets are the Antarctic ice sheet and the Greenland ice sheet. Ice sheets are bigger than ice shelves or alpine glaciers. Masses of ice covering less tha... | Physical sciences | Glaciology | null |
493890 | https://en.wikipedia.org/wiki/Juan%20de%20Fuca%20plate | Juan de Fuca plate | The Juan de Fuca plate is a small tectonic plate (microplate) generated from the Juan de Fuca Ridge that is subducting beneath the northerly portion of the western side of the North American plate at the Cascadia subduction zone. It is named after the explorer of the same name. One of the smallest of Earth's tectonic p... | Physical sciences | Tectonic plates | Earth science |
493913 | https://en.wikipedia.org/wiki/Plate%20armour | Plate armour | Plate armour is a historical type of personal body armour made from bronze, iron, or steel plates, culminating in the iconic suit of armour entirely encasing the wearer. Full plate steel armour developed in Europe during the Late Middle Ages, especially in the context of the Hundred Years' War, from the coat of plates ... | Technology | Armour | null |
494305 | https://en.wikipedia.org/wiki/Farallon%20plate | Farallon plate | The Farallon plate was an ancient oceanic tectonic plate. It formed one of the three main plates of Panthalassa, alongside the Izanagi plate and the Phoenix plate, which were connected by a triple junction. The Farallon plate began subducting under the west coast of the North American plate—then located in modern Utah—... | Physical sciences | Tectonic plates | Earth science |
494322 | https://en.wikipedia.org/wiki/South%20American%20plate | South American plate | The South American plate is a major tectonic plate which includes the continent of South America as well as a sizable region of the Atlantic Ocean seabed extending eastward to the African plate, with which it forms the southern part of the Mid-Atlantic Ridge.
The easterly edge is a divergent boundary with the African ... | Physical sciences | Tectonic plates | Earth science |
494418 | https://en.wikipedia.org/wiki/Proper%20time | Proper time | In relativity, proper time (from Latin, meaning own time) along a timelike world line is defined as the time as measured by a clock following that line. The proper time interval between two events on a world line is the change in proper time, which is independent of coordinates, and is a Lorentz scalar. The interval is... | Physical sciences | Theory of relativity | Physics |
1285803 | https://en.wikipedia.org/wiki/Corynebacterium%20diphtheriae | Corynebacterium diphtheriae | Corynebacterium diphtheriae is a Gram-positive pathogenic bacterium that causes diphtheria. It is also known as the Klebs–Löffler bacillus because it was discovered in 1884 by German bacteriologists Edwin Klebs (1834–1912) and Friedrich Löffler (1852–1915). These bacteria are usually harmless, unless they are infected ... | Biology and health sciences | Gram-positive bacteria | Plants |
1285813 | https://en.wikipedia.org/wiki/Corynebacterium | Corynebacterium | Corynebacterium () is a genus of Gram-positive bacteria and most are aerobic. They are bacilli (rod-shaped), and in some phases of life they are, more specifically, club-shaped, which inspired the genus name (coryneform means "club-shaped").
They are widely distributed in nature in the microbiota of animals (includin... | Biology and health sciences | Gram-positive bacteria | Plants |
1285827 | https://en.wikipedia.org/wiki/Steam%20distillation | Steam distillation | Steam distillation is a separation process that consists of distilling water together with other volatile and non-volatile components. The steam from the boiling water carries the vapor of the volatiles to a condenser; both are cooled and return to the liquid or solid state, while the non-volatile residues remain behi... | Physical sciences | Phase separations | Chemistry |
1286213 | https://en.wikipedia.org/wiki/Oroville%20Dam | Oroville Dam | Oroville Dam is an earthfill embankment dam on the Feather River east of the city of Oroville, California, in the Sierra Nevada foothills east of the Sacramento Valley. At 770 feet (235 m) high, it is the tallest dam in the U.S. and serves mainly for water supply, hydroelectricity generation, and flood control. The dam... | Technology | Dams | null |
1287695 | https://en.wikipedia.org/wiki/Sand%20tiger%20shark | Sand tiger shark | The sand tiger shark (Carcharias taurus), grey/gray nurse shark, spotted ragged-tooth shark, or blue-nurse sand tiger, is a species of shark that inhabits subtropical and temperate waters worldwide. It inhabits the continental shelf, from sandy shorelines (hence the name sand tiger shark) and submerged reefs to a depth... | Biology and health sciences | Sharks | Animals |
1288805 | https://en.wikipedia.org/wiki/Ceratopsia | Ceratopsia | Ceratopsia or Ceratopia ( or ; Greek: "horned faces") is a group of herbivorous, beaked dinosaurs that thrived in what are now North America, Europe, and Asia, during the Cretaceous Period, although ancestral forms lived earlier, in the Jurassic. The earliest known ceratopsian, Yinlong downsi, lived between 161.2 and 1... | Biology and health sciences | Ornitischians | Animals |
1291174 | https://en.wikipedia.org/wiki/Bike%20lane | Bike lane | Bike lanes (US) or cycle lanes (UK) are types of bikeways (cycleways) with lanes on the roadway for cyclists only. In the United Kingdom, an on-road cycle-lane can be firmly restricted to cycles (marked with a solid white line, entry by motor vehicles is prohibited) or advisory (marked with a broken white line, entry b... | Technology | Road infrastructure | null |
27179600 | https://en.wikipedia.org/wiki/Chemical%20weapon | Chemical weapon | A chemical weapon (CW) is a specialized munition that uses chemicals formulated to inflict death or harm on humans. According to the Organisation for the Prohibition of Chemical Weapons (OPCW), this can be any chemical compound intended as a weapon "or its precursor that can cause death, injury, temporary incapacitatio... | Technology | Weapons of mass destruction | null |
19851252 | https://en.wikipedia.org/wiki/Redlich%E2%80%93Kwong%20equation%20of%20state | Redlich–Kwong equation of state | In physics and thermodynamics, the Redlich–Kwong equation of state is an empirical, algebraic equation that relates temperature, pressure, and volume of gases. It is generally more accurate than the van der Waals equation and the ideal gas equation at temperatures above the critical temperature. It was formulated by ... | Physical sciences | Thermodynamics | Physics |
19852895 | https://en.wikipedia.org/wiki/Introduction%20to%20evolution | Introduction to evolution | In biology, evolution is the process of change in all forms of life over generations, and evolutionary biology is the study of how evolution occurs. Biological populations evolve through genetic changes that correspond to changes in the organisms' observable traits. Genetic changes include mutations, which are caused b... | Biology and health sciences | Basics_4 | Biology |
6376505 | https://en.wikipedia.org/wiki/Lophiodon | Lophiodon | Lophiodon (from , 'crest' and 'tooth') is an extinct genus of mammal related to chalicotheres. It lived in Eocene Europe , and was previously thought to be closely related to Hyrachyus. Lophiodon was named and described by Cuvier (1822) based on specimens from the Sables du Castrais Formation. There are various spec... | Biology and health sciences | Perissodactyla | Animals |
2654847 | https://en.wikipedia.org/wiki/Biopharmaceutical | Biopharmaceutical | A biopharmaceutical, also known as a biological medical product, or biologic, is any pharmaceutical drug product manufactured in, extracted from, or semisynthesized from biological sources. Different from totally synthesized pharmaceuticals, they include vaccines, whole blood, blood components, allergenics, somatic cel... | Technology | Biotechnology | null |
2655767 | https://en.wikipedia.org/wiki/Domestic%20duck | Domestic duck | Domestic ducks (mainly mallard, Anas platyrhynchos domesticus, with some Muscovy ducks, Cairina moschata domestica) are ducks that have been domesticated and raised for meat and eggs. A few are kept for show, or for their ornamental value. Most varieties of domesticated ducks, apart from the Muscovy duck and hybrids, ... | Biology and health sciences | Anseriformes | Animals |
2656829 | https://en.wikipedia.org/wiki/Giant%20petrel | Giant petrel | Giant petrels form a genus, Macronectes, from the family Procellariidae, which consists of two living and one extinct species. They are the largest birds in this family. Both extant species in the genus are native to the Southern Hemisphere. Giant petrels are extremely aggressive predators and scavengers, inspiring ano... | Biology and health sciences | Procellariiformes | Animals |
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