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4168 | https://en.wikipedia.org/wiki/Utility%20knife | Utility knife | A utility knife is any type of knife used for general manual work purposes. Such knives were originally fixed-blade knives with durable cutting edges suitable for rough work such as cutting cordage, cutting/scraping hides, butchering animals, cleaning fish scales, reshaping timber, and other tasks. Craft knives are sm... | Technology | Knives | null |
4169 | https://en.wikipedia.org/wiki/Bronze | Bronze | Bronze is an alloy consisting primarily of copper, commonly with about 12–12.5% tin and often with the addition of other metals (including aluminium, manganese, nickel, or zinc) and sometimes non-metals (such as phosphorus) or metalloids (such as arsenic or silicon). These additions produce a range of alloys some of wh... | Physical sciences | Chemistry | null |
4177 | https://en.wikipedia.org/wiki/Barge | Barge | A barge a typically flat-bottomed vessel which does not have its own means of mechanical propulsion. Original use was on inland waterways, while modern use is on both inland and marine water environments. The first modern barges were pulled by tugs, but on inland waterways, most are pushed by pusher boats, or other ves... | Technology | Maritime transport | null |
4183 | https://en.wikipedia.org/wiki/Botany | Botany | Botany, also called plant science or phytology, is the branch of natural science and biology studying plants, especially their anatomy, taxonomy, and ecology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. Nowadays, botanists (in the strict sense) study approximately 410,000 sp... | Biology and health sciences | Biology | null |
4185 | https://en.wikipedia.org/wiki/Bacteriophage | Bacteriophage | A bacteriophage (), also known informally as a phage (), is a virus that infects and replicates within bacteria and archaea. The term is derived . Bacteriophages are composed of proteins that encapsulate a DNA or RNA genome, and may have structures that are either simple or elaborate. Their genomes may encode as few as... | Biology and health sciences | Biology basics | Biology |
4194 | https://en.wikipedia.org/wiki/Bohrium | Bohrium | Bohrium is a synthetic chemical element; it has symbol Bh and atomic number 107. It is named after Danish physicist Niels Bohr. As a synthetic element, it can be created in particle accelerators but is not found in nature. All known isotopes of bohrium are highly radioactive; the most stable known isotope is 270Bh with... | Physical sciences | Group 7 | Chemistry |
4196 | https://en.wikipedia.org/wiki/Barnard%27s%20Star | Barnard's Star | Barnard's Star is a small red dwarf star in the constellation of Ophiuchus. At a distance of from Earth, it is the fourth-nearest-known individual star to the Sun after the three components of the Alpha Centauri system, and is the closest star in the northern celestial hemisphere. Its stellar mass is about 16% of the ... | Physical sciences | Notable stars | Astronomy |
4200 | https://en.wikipedia.org/wiki/Bo%C3%B6tes | Boötes | Boötes ( ) is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere. The name comes from , which comes from 'herdsman' or 'plowman' (literally, 'ox-driver'; from boûs 'cow').
One of the 48 constellations described by the 2nd-centu... | Physical sciences | Other | Astronomy |
4210 | https://en.wikipedia.org/wiki/Bipedalism | Bipedalism | Bipedalism is a form of terrestrial locomotion where an animal moves by means of its two rear (or lower) limbs or legs. An animal or machine that usually moves in a bipedal manner is known as a biped , meaning 'two feet' (from Latin bis 'double' and pes 'foot'). Types of bipedal movement include walking or running (a b... | Biology and health sciences | Ethology | null |
4214 | https://en.wikipedia.org/wiki/Bioinformatics | Bioinformatics | Bioinformatics () is an interdisciplinary field of science that develops methods and software tools for understanding biological data, especially when the data sets are large and complex. Bioinformatics uses biology, chemistry, physics, computer science, data science, computer programming, information engineering, math... | Biology and health sciences | Biology basics | Biology |
4230 | https://en.wikipedia.org/wiki/Cell%20%28biology%29 | Cell (biology) | The cell is the basic structural and functional unit of all forms of life. Every cell consists of cytoplasm enclosed within a membrane; many cells contain organelles, each with a specific function. The term comes from the Latin word meaning 'small room'. Most cells are only visible under a microscope. Cells emerged on... | Biology and health sciences | Science and medicine | null |
4266 | https://en.wikipedia.org/wiki/Binary%20search | Binary search | In computer science, binary search, also known as half-interval search, logarithmic search, or binary chop, is a search algorithm that finds the position of a target value within a sorted array. Binary search compares the target value to the middle element of the array. If they are not equal, the half in which the targ... | Mathematics | Algorithms | null |
4292 | https://en.wikipedia.org/wiki/Base%20pair | Base pair | A base pair (bp) is a fundamental unit of double-stranded nucleic acids consisting of two nucleobases bound to each other by hydrogen bonds. They form the building blocks of the DNA double helix and contribute to the folded structure of both DNA and RNA. Dictated by specific hydrogen bonding patterns, "Watson–Crick" (... | Biology and health sciences | Nucleic acids | Biology |
4320 | https://en.wikipedia.org/wiki/Binary%20search%20tree | Binary search tree | In computer science, a binary search tree (BST), also called an ordered or sorted binary tree, is a rooted binary tree data structure with the key of each internal node being greater than all the keys in the respective node's left subtree and less than the ones in its right subtree. The time complexity of operations on... | Mathematics | Data structures and types | null |
4359 | https://en.wikipedia.org/wiki/Boomerang | Boomerang | A boomerang () is a thrown tool typically constructed with airfoil sections and designed to spin about an axis perpendicular to the direction of its flight. A returning boomerang is designed to return to the thrower, while a non-returning boomerang is designed as a weapon to be thrown straight. Various forms of Boomera... | Technology | Projectile weapons | null |
4361 | https://en.wikipedia.org/wiki/Biological%20warfare | Biological warfare | Biological warfare, also known as germ warfare, is the use of biological toxins or infectious agents such as bacteria, viruses, insects, and fungi with the intent to kill, harm or incapacitate humans, animals or plants as an act of war. Biological weapons (often termed "bio-weapons", "biological threat agents", or "bio... | Technology | Weapons of mass destruction | null |
4393 | https://en.wikipedia.org/wiki/Bioterrorism | Bioterrorism | Bioterrorism is terrorism involving the intentional release or dissemination of biological agents. These agents include bacteria, viruses, insects, fungi, and/or their toxins, and may be in a naturally occurring or a human-modified form, in much the same way as in biological warfare. Further, modern agribusiness is vul... | Technology | Biotechnology | null |
4396 | https://en.wikipedia.org/wiki/Northrop%20B-2%20Spirit | Northrop B-2 Spirit | The Northrop B-2 Spirit, also known as the Stealth Bomber, is an American heavy strategic bomber, featuring low-observable stealth technology designed to penetrate dense anti-aircraft defenses. A subsonic flying wing with a crew of two, the plane was designed by Northrop (later Northrop Grumman) as the prime contractor... | Technology | Specific aircraft | null |
4399 | https://en.wikipedia.org/wiki/Beaver | Beaver | Beavers (genus Castor) are large, semiaquatic rodents of the Northern Hemisphere. There are two existing species: the North American beaver (Castor canadensis) and the Eurasian beaver (C. fiber). Beavers are the second-largest living rodents, after capybaras, weighing up to . They have stout bodies with large heads, lo... | Biology and health sciences | Rodents | null |
4400 | https://en.wikipedia.org/wiki/Bear | Bear | Bears are carnivoran mammals of the family Ursidae (). They are classified as caniforms, or doglike carnivorans. Although only eight species of bears are extant, they are widespread, appearing in a wide variety of habitats throughout most of the Northern Hemisphere and partially in the Southern Hemisphere. Bears are f... | Biology and health sciences | Carnivora | null |
4401 | https://en.wikipedia.org/wiki/Bald%20eagle | Bald eagle | The bald eagle (Haliaeetus leucocephalus) is a bird of prey found in North America. A sea eagle, it has two known subspecies and forms a species pair with the white-tailed eagle (Haliaeetus albicilla), which occupies the same niche as the bald eagle in the Palearctic. Its range includes most of Canada and Alaska, all o... | Biology and health sciences | Accipitrimorphae | Animals |
4402 | https://en.wikipedia.org/wiki/Brown%20bear | Brown bear | The brown bear (Ursus arctos) is a large bear native to Eurasia and North America. Of the land carnivorans, it is rivaled in size only by its closest relative, the polar bear, which is much less variable in size and slightly bigger on average. The brown bear is a sexually dimorphic species, as adult males are larger an... | Biology and health sciences | Carnivora | null |
4436 | https://en.wikipedia.org/wiki/Brownian%20motion | Brownian motion | Brownian motion is the random motion of particles suspended in a medium (a liquid or a gas).
This motion pattern typically consists of random fluctuations in a particle's position inside a fluid sub-domain, followed by a relocation to another sub-domain. Each relocation is followed by more fluctuations within the new ... | Physical sciences | Thermodynamics | Physics |
4473 | https://en.wikipedia.org/wiki/BIOS | BIOS | In computing, BIOS (, ; Basic Input/Output System, also known as the System BIOS, ROM BIOS, BIOS ROM or PC BIOS) is firmware used to provide runtime services for operating systems and programs and to perform hardware initialization during the booting process (power-on startup). The firmware comes pre-installed on the c... | Technology | Computer hardware | null |
4474 | https://en.wikipedia.org/wiki/Bose%E2%80%93Einstein%20condensate | Bose–Einstein condensate | In condensed matter physics, a Bose–Einstein condensate (BEC) is a state of matter that is typically formed when a gas of bosons at very low densities is cooled to temperatures very close to absolute zero, i.e., . Under such conditions, a large fraction of bosons occupy the lowest quantum state, at which microscopic qu... | Physical sciences | States of matter | null |
4476 | https://en.wikipedia.org/wiki/Beer%E2%80%93Lambert%20law | Beer–Lambert law | The Beer–Bouguer–Lambert (BBL) extinction law is an empirical relationship describing the attenuation in intensity of a radiation beam passing through a macroscopically homogenous medium with which it interacts. Formally, it states that the intensity of radiation decays exponentially in the absorbance of the medium, a... | Physical sciences | Optics | Physics |
4485 | https://en.wikipedia.org/wiki/Bakelite | Bakelite | Bakelite ( ), formally , is a thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol with formaldehyde. The first plastic made from synthetic components, it was developed by Leo Baekeland in Yonkers, New York, in 1907, and patented on December 7, 1909.
Bakelite was one of the first plas... | Physical sciences | Polymers | Chemistry |
4487 | https://en.wikipedia.org/wiki/Bean | Bean | A bean is the seed of any plant in the legume family (Fabaceae) used as a vegetable for human consumption or animal feed. The seeds are often preserved through drying, but fresh beans are also sold. Most beans are traditionally soaked and boiled, but they can be cooked in many different ways, including frying and bakin... | Biology and health sciences | Fabales | null |
4489 | https://en.wikipedia.org/wiki/Breast | Breast | The breasts are two prominences located on the upper ventral region of the torso among humans and other primates. Both sexes develop breasts from the same embryological tissues. The relative size and development of the breasts is a major secondary sex distinction between females and males. There is also considerable va... | Biology and health sciences | Integumentary system | null |
4495 | https://en.wikipedia.org/wiki/British%20thermal%20unit | British thermal unit | The British thermal unit (Btu) is a measure of heat, which is a form of energy. It was originally defined as the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. It is also part of the United States customary units. The SI unit for energy is the joule (J); one Btu equals ... | Physical sciences | Energy | Basics and measurement |
4502 | https://en.wikipedia.org/wiki/Biotechnology | Biotechnology | Biotechnology is a multidisciplinary field that involves the integration of natural sciences and engineering sciences in order to achieve the application of organisms and parts thereof for products and services.
The term biotechnology was first used by Károly Ereky in 1919 to refer to the production of products from r... | Technology | Food and health | null |
4519 | https://en.wikipedia.org/wiki/Ballpoint%20pen | Ballpoint pen | A ballpoint pen, also known as a biro (British English), ball pen (Hong Kong, Indonesia, Pakistani, Indian and Philippine English), or dot pen (Nepali English and South Asian English), is a pen that dispenses ink (usually in paste form) over a metal ball at its point, i.e., over a "ball point". The metals commonly used... | Technology | Writing tools | null |
4526 | https://en.wikipedia.org/wiki/Brick | Brick | A brick is a type of construction material used to build walls, pavements and other elements in masonry construction. Properly, the term brick denotes a unit primarily composed of clay, but is now also used informally to denote units made of other materials or other chemically cured construction blocks. Bricks can be j... | Technology | Building materials | null |
4531 | https://en.wikipedia.org/wiki/Bipolar%20disorder | Bipolar disorder | Bipolar disorder, previously known as manic depression, is a mental disorder characterized by periods of depression and periods of abnormally elevated mood that each last from days to weeks. If the elevated mood is severe or associated with psychosis, it is called mania; if it is less severe and does not significantly ... | Biology and health sciences | Mental disorder | null |
4542 | https://en.wikipedia.org/wiki/Bra%E2%80%93ket%20notation | Bra–ket notation | Bra–ket notation, also called Dirac notation, is a notation for linear algebra and linear operators on complex vector spaces together with their dual space both in the finite-dimensional and infinite-dimensional case. It is specifically designed to ease the types of calculations that frequently come up in quantum mecha... | Physical sciences | Quantum mechanics | Physics |
4543 | https://en.wikipedia.org/wiki/Blue | Blue | Blue is one of the three primary colours in the RYB colour model (traditional colour theory), as well as in the RGB (additive) colour model. It lies between violet and cyan on the spectrum of visible light. The term blue generally describes colours perceived by humans observing light with a dominant wavelength that's b... | Physical sciences | Color terms | null |
4548 | https://en.wikipedia.org/wiki/Blizzard | Blizzard | A blizzard is a severe snowstorm characterized by strong sustained winds and low visibility, lasting for a prolonged period of time—typically at least three or four hours. A ground blizzard is a weather condition where snow that has already fallen is being blown by wind. Blizzards can have an immense size and usually s... | Physical sciences | Storms | null |
4583 | https://en.wikipedia.org/wiki/Bison | Bison | A bison (: bison) is a large bovine in the genus Bison (Greek: "wild ox" (bison)) within the tribe Bovini. Two extant and numerous extinct species are recognised.
Of the two surviving species, the American bison, B. bison, found only in North America, is the more numerous. Although colloquially referred to as a buffal... | Biology and health sciences | Bovidae | Animals |
4584 | https://en.wikipedia.org/wiki/Baryon | Baryon | In particle physics, a baryon is a type of composite subatomic particle that contains an odd number of valence quarks, conventionally three. Protons and neutrons are examples of baryons; because baryons are composed of quarks, they belong to the hadron family of particles. Baryons are also classified as fermions becaus... | Physical sciences | Fermions | null |
4594 | https://en.wikipedia.org/wiki/Block%20cipher | Block cipher | In cryptography, a block cipher is a deterministic algorithm that operates on fixed-length groups of bits, called blocks. Block ciphers are the elementary building blocks of many cryptographic protocols. They are ubiquitous in the storage and exchange of data, where such data is secured and authenticated via encryption... | Technology | Computer security | null |
4614 | https://en.wikipedia.org/wiki/Boeing%20747 | Boeing 747 | The Boeing 747 is a long-range wide-body airliner designed and manufactured by Boeing Commercial Airplanes in the United States between 1968 and 2023.
After the introduction of the 707 in October 1958, Pan Am wanted a jet times its size, to reduce its seat cost by 30%. In 1965, Joe Sutter left the 737 development pro... | Technology | Specific aircraft_2 | null |
4650 | https://en.wikipedia.org/wiki/Black%20hole | Black hole | A black hole is a region of spacetime wherein gravity is so strong that no matter or electromagnetic energy (e.g. light) can escape it. Albert Einstein's theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. The boundary of no escape is called the event horizo... | Physical sciences | Astronomy | null |
4651 | https://en.wikipedia.org/wiki/Beta%20decay | Beta decay | In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which an atomic nucleus emits a beta particle (fast energetic electron or positron), transforming into an isobar of that nuclide. For example, beta decay of a neutron transforms it into a proton by the emission of an electron accompanied by an a... | Physical sciences | Nuclear physics | Physics |
4654 | https://en.wikipedia.org/wiki/Bee | Bee | Bees are winged insects closely related to wasps and ants, known for their roles in pollination and, in the case of the best-known bee species, the western honey bee, for producing honey. Bees are a monophyletic lineage within the superfamily Apoidea. They are currently considered a clade, called Anthophila. There are ... | Biology and health sciences | Hymenoptera | null |
15975113 | https://en.wikipedia.org/wiki/Hawaiian%20honeycreeper | Hawaiian honeycreeper | Hawaiian honeycreepers are a group of small birds endemic to Hawaii. They are members of the finch family Fringillidae, closely related to the rosefinches (Carpodacus), but many species have evolved features unlike those present in any other finch. Their great morphological diversity is the result of adaptive radiation... | Biology and health sciences | Passerida | Animals |
15982783 | https://en.wikipedia.org/wiki/Winchester%20measure | Winchester measure | Winchester measure is a set of legal standards of volume instituted in the late 15th century (1495) by King Henry VII of England and in use, with some modifications, until the present day. It consists of the Winchester bushel and its dependent quantities, the peck, (dry) gallon and (dry) quart. They would later become ... | Physical sciences | Measurement systems | Basics and measurement |
10806718 | https://en.wikipedia.org/wiki/Data%20sharing | Data sharing | Data sharing is the practice of making data used for scholarly research available to other investigators. Many funding agencies, institutions, and publication venues have policies regarding data sharing because transparency and openness are considered by many to be part of the scientific method.
A number of funding ag... | Physical sciences | Science basics | Basics and measurement |
10809525 | https://en.wikipedia.org/wiki/Port%20of%20Ningbo-Zhoushan | Port of Ningbo-Zhoushan | The Port of Ningbo-Zhoushan is the busiest port in the world in terms of cargo tonnage. It handled 888.96 million tons of cargo in 2015. The port is located in Ningbo and Zhoushan, on the coast of the East China Sea, in Zhejiang province on the southeast end of Hangzhou Bay, across which it faces the municipality of Sh... | Technology | Specific piers and ports | null |
9311172 | https://en.wikipedia.org/wiki/Drug | Drug | A drug is any chemical substance other than a nutrient or an essential dietary ingredient, which, when administered to a living organism, produces a biological effect. Consumption of drugs can be via inhalation, injection, smoking, ingestion, absorption via a patch on the skin, suppository, or dissolution under the to... | Biology and health sciences | Drugs and medication | null |
1524030 | https://en.wikipedia.org/wiki/Cyclohexane%20conformation | Cyclohexane conformation | Cyclohexane conformations are any of several three-dimensional shapes adopted by cyclohexane. Because many compounds feature structurally similar six-membered rings, the structure and dynamics of cyclohexane are important prototypes of a wide range of compounds.
The internal angles of a regular, flat hexagon are 120°,... | Physical sciences | Stereochemistry | Chemistry |
1524766 | https://en.wikipedia.org/wiki/Low-Frequency%20Array | Low-Frequency Array | The Low-Frequency Array (LOFAR) is a large radio telescope, with an antenna network located mainly in the Netherlands, and spreading across 7 other European countries as of 2019. Originally designed and built by ASTRON, the Netherlands Institute for Radio Astronomy, it was first opened by Queen Beatrix of The Netherlan... | Technology | Ground-based observatories | null |
1526695 | https://en.wikipedia.org/wiki/Blue%20spruce | Blue spruce | The blue spruce (Picea pungens), also commonly known as Colorado spruce or Colorado blue spruce, is a species of spruce tree native to North America in Arizona, Colorado, Idaho, New Mexico, Utah and Wyoming. It is noted for its blue-green colored needles, and has therefore been used as an ornamental tree in many places... | Biology and health sciences | Pinaceae | Plants |
1527059 | https://en.wikipedia.org/wiki/Percussion%20%28medicine%29 | Percussion (medicine) | Percussion is a technique of clinical examination.
Overview
Percussion is a method of tapping on a surface to determine the underlying structures, and is used in clinical examinations to assess the condition of the thorax or abdomen. It is one of the four methods of clinical examination, together with inspection, pal... | Biology and health sciences | Diagnostics | Health |
3002110 | https://en.wikipedia.org/wiki/Language%20binding | Language binding | In programming and software design, a binding is an application programming interface (API) that provides glue code specifically made to allow a programming language to use a foreign library or operating system service (one that is not native to that language).
Characteristics
Binding generally refers to a mapping of ... | Technology | Programming languages | null |
5492915 | https://en.wikipedia.org/wiki/Mesosaurus | Mesosaurus | Mesosaurus (meaning "middle lizard") is an extinct genus of reptile from the Early Permian of southern Africa and South America. Along with it, the genera Brazilosaurus and Stereosternum, it is a member of the family Mesosauridae and the order Mesosauria. Mesosaurus was long thought to have been one of the first marine... | Biology and health sciences | Prehistoric marine reptiles | Animals |
5493795 | https://en.wikipedia.org/wiki/Stability%20theory | Stability theory | In mathematics, stability theory addresses the stability of solutions of differential equations and of trajectories of dynamical systems under small perturbations of initial conditions. The heat equation, for example, is a stable partial differential equation because small perturbations of initial data lead to small v... | Mathematics | Dynamical systems | null |
5498706 | https://en.wikipedia.org/wiki/Current%20density | Current density | In electromagnetism, current density is the amount of charge per unit time that flows through a unit area of a chosen cross section. The current density vector is defined as a vector whose magnitude is the electric current per cross-sectional area at a given point in space, its direction being that of the motion of the... | Physical sciences | Electrodynamics | Physics |
11794177 | https://en.wikipedia.org/wiki/Carya%20laciniosa | Carya laciniosa | Carya laciniosa, the shellbark hickory, in the Juglandaceae or walnut family is also called kingnut, big, bottom, thick, or western shellbark, attesting to some of its characteristics. It is a slow-growing, long-lived tree, hard to transplant because of its long taproot, and subject to insect damage. The nuts, largest ... | Biology and health sciences | Fagales | Plants |
11794330 | https://en.wikipedia.org/wiki/Carya%20tomentosa | Carya tomentosa | Carya tomentosa, commonly known as mockernut hickory, mockernut, white hickory, whiteheart hickory, hognut, bullnut, is a species of tree in the walnut family Juglandaceae. The most abundant of the hickories, and common in the eastern half of the United States, it is long lived, sometimes reaching the age of 500 years.... | Biology and health sciences | Fagales | Plants |
11795855 | https://en.wikipedia.org/wiki/Caninae | Caninae | Caninae (whose members are known as canines () is the only living subfamily within Canidae, alongside the extinct Borophaginae and Hesperocyoninae. They first appeared in North America, during the Oligocene around 35 million years ago, subsequently spreading to Asia and elsewhere in the Old World at the end of the Mioc... | Biology and health sciences | Canines | Animals |
4117384 | https://en.wikipedia.org/wiki/NGC%206302 | NGC 6302 | NGC 6302 (also known as the Bug Nebula, Butterfly Nebula, or Caldwell 69) is a bipolar planetary nebula in the constellation Scorpius. The structure in the nebula is among the most complex ever seen in planetary nebulae. The spectrum of Butterfly Nebula shows that its central star is one of the hottest stars known, wit... | Physical sciences | Notable nebulae | Astronomy |
4122592 | https://en.wikipedia.org/wiki/Computer%20network | Computer network | A computer network is a set of computers sharing resources located on or provided by network nodes. Computers use common communication protocols over digital interconnections to communicate with each other. These interconnections are made up of telecommunication network technologies based on physically wired, optical, ... | Technology | Networks | null |
577876 | https://en.wikipedia.org/wiki/Redox%20indicator | Redox indicator | A redox indicator (also called an oxidation-reduction indicator) is an indicator which undergoes a definite color change at a specific electrode potential.
The requirement for fast and reversible color change means that the oxidation-reduction equilibrium for an indicator redox system needs to be established very quic... | Physical sciences | Chemical methods | Chemistry |
577881 | https://en.wikipedia.org/wiki/Chromate%20and%20dichromate | Chromate and dichromate | Chromate salts contain the chromate anion, . Dichromate salts contain the dichromate anion, . They are oxyanions of chromium in the +6 oxidation state and are moderately strong oxidizing agents. In an aqueous solution, chromate and dichromate ions can be interconvertible.
Chemical properties
Chromates react with hyd... | Physical sciences | Metallic oxyanions | Chemistry |
577962 | https://en.wikipedia.org/wiki/Half-cell | Half-cell | In electrochemistry, a half-cell is a structure that contains a conductive electrode and a surrounding conductive electrolyte separated by a naturally occurring Helmholtz double layer. Chemical reactions within this layer momentarily pump electric charges between the electrode and the electrolyte, resulting in a potent... | Physical sciences | Electrochemistry | Chemistry |
578099 | https://en.wikipedia.org/wiki/Hypochlorous%20acid | Hypochlorous acid | Hypochlorous acid is an inorganic compound with the chemical formula , also written as HClO, HOCl, or ClHO. Its structure is . It is an acid that forms when chlorine dissolves in water, and itself partially dissociates, forming a hypochlorite anion, . HClO and are oxidizers, and the primary disinfection agents of chlo... | Physical sciences | Specific acids | Chemistry |
578150 | https://en.wikipedia.org/wiki/Standard%20hydrogen%20electrode | Standard hydrogen electrode | In electrochemistry, the standard hydrogen electrode (abbreviated SHE), is a redox electrode which forms the basis of the thermodynamic scale of oxidation-reduction potentials. Its absolute electrode potential is estimated to be at 25 °C, but to form a basis for comparison with all other electrochemical reactions, hyd... | Physical sciences | Electrochemistry | Chemistry |
578550 | https://en.wikipedia.org/wiki/Bush%20dog | Bush dog | The bush dog (Speothos venaticus) is a canine found in Central and South America. In spite of its extensive range, it is very rare in most areas except in Suriname, Guyana and Peru; it was first described by Peter Wilhelm Lund from fossils in Brazilian caves and was believed to be extinct.
The bush dog is the only ext... | Biology and health sciences | Canines | Animals |
578923 | https://en.wikipedia.org/wiki/Anterior%20cruciate%20ligament | Anterior cruciate ligament | The anterior cruciate ligament (ACL) is one of a pair of cruciate ligaments (the other being the posterior cruciate ligament) in the human knee. The two ligaments are called "cruciform" ligaments, as they are arranged in a crossed formation. In the quadruped stifle joint (analogous to the knee), based on its anatomical... | Biology and health sciences | Human anatomy | Health |
579019 | https://en.wikipedia.org/wiki/Agouti | Agouti | The agouti (, ) or common agouti is many of several rodent species of the genus Dasyprocta. They are native to Central America, northern and central South America, and the southern Lesser Antilles. Some species have also been introduced elsewhere in the West Indies. They are related to guinea pigs and look quite simila... | Biology and health sciences | Rodents | Animals |
579026 | https://en.wikipedia.org/wiki/Gravitational%20potential | Gravitational potential | In classical mechanics, the gravitational potential is a scalar potential associating with each point in space the work (energy transferred) per unit mass that would be needed to move an object to that point from a fixed reference point in the conservative gravitational field. It is analogous to the electric potential ... | Physical sciences | Classical mechanics | Physics |
579219 | https://en.wikipedia.org/wiki/%CE%92-Carotene | Β-Carotene | β-Carotene (beta-carotene) is an organic, strongly colored red-orange pigment abundant in fungi, plants, and fruits. It is a member of the carotenes, which are terpenoids (isoprenoids), synthesized biochemically from eight isoprene units and thus having 40 carbons.
Dietary β-carotene is a provitamin A compound, conver... | Biology and health sciences | Biological pigments | Biology |
579223 | https://en.wikipedia.org/wiki/Land%20reclamation | Land reclamation | Land reclamation, often known as reclamation, and also known as land fill (not to be confused with a waste landfill), is the process of creating new land from oceans, seas, riverbeds or lake beds. The land reclaimed is known as reclamation ground, reclaimed land, or land fill.
History
In Ancient Egypt, the rulers of t... | Physical sciences | Artificial landforms | null |
579730 | https://en.wikipedia.org/wiki/Data%20center | Data center | A data center is a building, a dedicated space within a building, or a group of buildings used to house computer systems and associated components, such as telecommunications and storage systems.
Since IT operations are crucial for business continuity, it generally includes redundant or backup components and infrastru... | Technology | Commercial buildings | null |
580252 | https://en.wikipedia.org/wiki/Reuleaux%20triangle | Reuleaux triangle | A Reuleaux triangle is a curved triangle with constant width, the simplest and best known curve of constant width other than the circle. It is formed from the intersection of three circular disks, each having its center on the boundary of the other two. Constant width means that the separation of every two parallel su... | Mathematics | Two-dimensional space | null |
580863 | https://en.wikipedia.org/wiki/Trowel | Trowel | A trowel is a small hand tool used for digging, applying, smoothing, or moving small amounts of viscous or particulate material. Common varieties include the masonry trowel, garden trowel, and float trowel.
A power trowel is a much larger gasoline or electrically powered walk-behind device with rotating paddles used ... | Technology | Agricultural tools | null |
580880 | https://en.wikipedia.org/wiki/Tonkinese%20cat | Tonkinese cat | Tonkinese is a domestic cat breed produced by crossbreeding between the Siamese and Burmese. Members of the breed are distinguished by a pointed coat pattern in a variety of colors. In addition to the modified coat colors of the "mink" pattern, which is a dilution of the point color, the breed is now being shown in the... | Biology and health sciences | Cats | Animals |
580936 | https://en.wikipedia.org/wiki/Sulfur%20trioxide | Sulfur trioxide | Sulfur trioxide (alternative spelling sulphur trioxide) is the chemical compound with the formula SO3. It has been described as "unquestionably the most [economically] important sulfur oxide". It is prepared on an industrial scale as a precursor to sulfuric acid.
Sulfur trioxide exists in several forms: gaseous monome... | Physical sciences | Covalent oxides | Chemistry |
581091 | https://en.wikipedia.org/wiki/Auscultation | Auscultation | Auscultation (based on the Latin verb auscultare "to listen") is listening to the internal sounds of the body, usually using a stethoscope. Auscultation is performed for the purposes of examining the circulatory and respiratory systems (heart and breath sounds), as well as the alimentary canal.
The term was introduced... | Biology and health sciences | Diagnostics | Health |
581326 | https://en.wikipedia.org/wiki/Littoral%20zone | Littoral zone | The littoral zone, also called litoral or nearshore, is the part of a sea, lake, or river that is close to the shore. In coastal ecology, the littoral zone includes the intertidal zone extending from the high water mark (which is rarely inundated), to coastal areas that are permanently submerged — known as the foreshor... | Physical sciences | Oceanography | Earth science |
581471 | https://en.wikipedia.org/wiki/Oviraptor | Oviraptor | Oviraptor (; ) is a genus of oviraptorid dinosaur that lived in Asia during the Late Cretaceous period. The first remains were collected from the Djadokhta Formation of Mongolia in 1923 during a paleontological expedition led by Roy Chapman Andrews, and in the following year the genus and type species Oviraptor philoce... | Biology and health sciences | Theropods | Animals |
581543 | https://en.wikipedia.org/wiki/Pit%20viper | Pit viper | The Crotalinae, commonly known as pit vipers, or pit adders, are a subfamily of vipers found in Asia and the Americas. Like all other vipers, they are venomous. They are distinguished by the presence of a heat-sensing pit organ located between the eye and the nostril on both sides of the head. Currently, 23 genera and... | Biology and health sciences | Snakes | Animals |
581632 | https://en.wikipedia.org/wiki/Mountain%20gorilla | Mountain gorilla | The mountain gorilla (Gorilla beringei beringei) is one of the two subspecies of the eastern gorilla. It is listed as endangered by the IUCN .
There are two populations: One is found in the Virunga volcanic mountains of Central/East Africa, within three National Parks: Mgahinga, in southwest Uganda; Volcanoes, in nort... | Biology and health sciences | Apes | Animals |
581797 | https://en.wikipedia.org/wiki/Matching%20%28graph%20theory%29 | Matching (graph theory) | In the mathematical discipline of graph theory, a matching or independent edge set in an undirected graph is a set of edges without common vertices. In other words, a subset of the edges is a matching if each vertex appears in at most one edge of that matching. Finding a matching in a bipartite graph can be treated as ... | Mathematics | Graph theory | null |
2174399 | https://en.wikipedia.org/wiki/Tehran%20Metro | Tehran Metro | Tehran Metro () is a rapid transit system serving Tehran, the capital of Iran. It is the largest metro system in the Middle East. The system is owned and operated by Tehran Urban and Suburban Railway. It consists of six operational metro lines (and an additional commuter rail line), with construction under way on seven... | Technology | Asia_2 | null |
14469976 | https://en.wikipedia.org/wiki/Microbial%20cyst | Microbial cyst | A microbial cyst is a resting or dormant stage of a microorganism, that can be thought of as a state of suspended animation in which the metabolic processes of the cell are slowed and the cell ceases all activities like feeding and locomotion. Many groups of single-celled, microscopic organisms, or microbes, possess th... | Biology and health sciences | Biological reproduction | null |
13309470 | https://en.wikipedia.org/wiki/Hawaii%20hotspot | Hawaii hotspot | The Hawaii hotspot is a volcanic hotspot located near the namesake Hawaiian Islands, in the northern Pacific Ocean. One of the best known and intensively studied hotspots in the world, the Hawaii plume is responsible for the creation of the Hawaiian–Emperor seamount chain, a mostly undersea volcanic mountain range. F... | Physical sciences | Geologic features | Earth science |
13311819 | https://en.wikipedia.org/wiki/Therapy | Therapy | A therapy or medical treatment is the attempted remediation of a health problem, usually following a medical diagnosis. Both words, treatment and therapy, are often abbreviated tx, Tx, or Tx.
As a rule, each therapy has indications and contraindications. There are many different types of therapy. Not all therapies a... | Biology and health sciences | Medical procedures | null |
7001745 | https://en.wikipedia.org/wiki/Impedance%20of%20free%20space | Impedance of free space | In electromagnetism, the impedance of free space, , is a physical constant relating the magnitudes of the electric and magnetic fields of electromagnetic radiation travelling through free space. That is,
where is the electric field strength, and is the magnetic field strength. Its presently accepted value is
,
wh... | Physical sciences | Physical constants | Physics |
7005062 | https://en.wikipedia.org/wiki/Energy%20conversion%20efficiency | Energy conversion efficiency | Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as well as the useful output may be chemical, electric power, mechanical work, light (radiation), or heat. The resulting value, η (eta), ranges between 0 and 1.
Overview
E... | Physical sciences | Thermodynamics | Physics |
323392 | https://en.wikipedia.org/wiki/Theoretical%20computer%20science | Theoretical computer science | Theoretical computer science is a subfield of computer science and mathematics that focuses on the abstract and mathematical foundations of computation.
It is difficult to circumscribe the theoretical areas precisely. The ACM's Special Interest Group on Algorithms and Computation Theory (SIGACT) provides the following... | Mathematics | Discrete mathematics | null |
323559 | https://en.wikipedia.org/wiki/Common%20wood%20pigeon | Common wood pigeon | The common wood pigeon (Columba palumbus), also known as simply wood pigeon, is a large species in the dove and pigeon family (Columbidae), native to the western Palearctic. It belongs to the genus Columba, which includes closely related species such as the rock dove (Columba livia). It has a flexible diet, predominant... | Biology and health sciences | Columbimorphae | Animals |
323654 | https://en.wikipedia.org/wiki/Eublepharis | Eublepharis | Eublepharis is a genus of terrestrial geckos native to eastern and southwestern Asia. The genus was first described by the British zoologist John Edward Gray in 1827. The etymology of their name is 'eu' = good (=true) |'blephar' = eyelid, and all have fully functional eyelids. Members of this genus are found in eastern... | Biology and health sciences | Lizards and other Squamata | Animals |
323825 | https://en.wikipedia.org/wiki/Skink | Skink | Skinks are lizards belonging to the family Scincidae, a family in the infraorder Scincomorpha. With more than 1,500 described species across 100 different taxonomic genera, the family Scincidae is one of the most diverse families of lizards. Skinks are characterized by their smaller legs in comparison to typical lizard... | Biology and health sciences | Reptiles | null |
323964 | https://en.wikipedia.org/wiki/Subsistence%20agriculture | Subsistence agriculture | Subsistence agriculture occurs when farmers grow crops on smallholdings to meet the needs of themselves and their families. Subsistence agriculturalists target farm output for survival and for mostly local requirements. Planting decisions occur principally with an eye toward what the family will need during the coming ... | Technology | Forms | null |
323988 | https://en.wikipedia.org/wiki/Eurasian%20collared%20dove | Eurasian collared dove | The Eurasian collared dove (Streptopelia decaocto), often simply just collared dove, is a dove species native to Europe, Asia, and northern Africa. It has also been introduced to Japan, North and Central America, and the islands in the Caribbean.
Taxonomy
The Hungarian naturalist Imre Frivaldszky first described the ... | Biology and health sciences | Columbimorphae | Animals |
323990 | https://en.wikipedia.org/wiki/Cash%20crop | Cash crop | A cash crop, also called profit crop, is an agricultural crop which is grown to sell for profit. It is typically purchased by parties separate from a farm. The term is used to differentiate a marketed crop from a staple crop ("subsistence crop") in subsistence agriculture, which is one fed to the producer's own livesto... | Technology | Basics_2 | null |
324375 | https://en.wikipedia.org/wiki/Parameter%20%28computer%20programming%29 | Parameter (computer programming) | In computer programming, a parameter or a formal argument is a special kind of variable used in a subroutine to refer to one of the pieces of data provided as input to the subroutine. These pieces of data are the values of the arguments (often called actual arguments or actual parameters) with which the subroutine is ... | Technology | Software development: General | null |
324498 | https://en.wikipedia.org/wiki/Mortar%20%28masonry%29 | Mortar (masonry) | Mortar is a workable paste which hardens to bind building blocks such as stones, bricks, and concrete masonry units, to fill and seal the irregular gaps between them, spread the weight of them evenly, and sometimes to add decorative colours or patterns to masonry walls. In its broadest sense, mortar includes pitch, as... | Technology | Building materials | null |
324499 | https://en.wikipedia.org/wiki/Mortar%20%28weapon%29 | Mortar (weapon) | A mortar today is usually a simple, lightweight, man-portable, muzzle-loaded cannon, consisting of a smooth-bore (although some models use a rifled barrel) metal tube fixed to a base plate (to spread out the recoil) with a lightweight bipod mount and a sight. Mortars are typically used as indirect fire weapons for clos... | Technology | Artillery and siege | null |
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