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113424 | https://en.wikipedia.org/wiki/Chi-squared%20distribution | Chi-squared distribution | In probability theory and statistics, the chi-squared distribution (also chi-square or -distribution) with degrees of freedom is the distribution of a sum of the squares of independent standard normal random variables.
The chi-squared distribution is a special case of the gamma distribution and the univariate Wisha... | Mathematics | Probability | null |
113469 | https://en.wikipedia.org/wiki/Joule%E2%80%93Thomson%20effect | Joule–Thomson effect | In thermodynamics, the Joule–Thomson effect (also known as the Joule–Kelvin effect or Kelvin–Joule effect) describes the temperature change of a real gas or liquid (as differentiated from an ideal gas) when it is expanding; typically caused by the pressure loss from flow through a valve or porous plug while keeping it ... | Physical sciences | Thermodynamics | Physics |
113496 | https://en.wikipedia.org/wiki/Space%20weather | Space weather | Space weather is a branch of space physics and aeronomy, or heliophysics, concerned with the varying conditions within the Solar System and its heliosphere. This includes the effects of the solar wind, especially on the Earth's magnetosphere, ionosphere, thermosphere, and exosphere. Though physically distinct, space we... | Physical sciences | Astronomy basics | Astronomy |
113499 | https://en.wikipedia.org/wiki/Aestivation | Aestivation | Aestivation ( (summer); also spelled estivation in American English) is a state of animal dormancy, similar to hibernation, although taking place in the summer rather than the winter. Aestivation is characterized by inactivity and a lowered metabolic rate, that is entered in response to high temperatures and arid condi... | Biology and health sciences | Ethology | Biology |
113509 | https://en.wikipedia.org/wiki/AM%20broadcasting | AM broadcasting | AM broadcasting is radio broadcasting using amplitude modulation (AM) transmissions. It was the first method developed for making audio radio transmissions, and is still used worldwide, primarily for medium wave (also known as "AM band") transmissions, but also on the longwave and shortwave radio bands.
The earliest ... | Technology | Broadcasting | null |
113530 | https://en.wikipedia.org/wiki/Fen | Fen | A fen is a type of peat-accumulating wetland fed by mineral-rich ground or surface water. It is one of the main types of wetland along with marshes, swamps, and bogs. Bogs and fens, both peat-forming ecosystems, are also known as mires. The unique water chemistry of fens is a result of the ground or surface water input... | Physical sciences | Wetlands | Earth science |
113604 | https://en.wikipedia.org/wiki/Broadcasting | Broadcasting | Broadcasting is the distribution of audio or video content to a dispersed audience via any electronic mass communications medium, but typically one using the electromagnetic spectrum (radio waves), in a one-to-many model. Broadcasting began with AM radio, which came into popular use around 1920 with the spread of vacuu... | Technology | Media | null |
113624 | https://en.wikipedia.org/wiki/Graphics%20card | Graphics card | A graphics card (also called a video card, display card, graphics accelerator, graphics adapter, VGA card/VGA, video adapter, display adapter, or colloquially GPU) is a computer expansion card that generates a feed of graphics output to a display device such as a monitor. Graphics cards are sometimes called discrete or... | Technology | Computer hardware | null |
113673 | https://en.wikipedia.org/wiki/Pitcher%20plant | Pitcher plant | Pitcher plants are carnivorous plants
known as pitfall traps—a prey-trapping mechanism featuring a deep cavity filled with digestive liquid. The traps of pitcher plant are considered to be "true" pitcher plants and are formed by specialized leaves. The plants attract and drown the prey with nectar.
Types
The term "... | Biology and health sciences | Botany | Biology |
2534996 | https://en.wikipedia.org/wiki/Oxyaenidae | Oxyaenidae | Oxyaenidae ("sharp hyenas") is a family of extinct carnivorous placental mammals. Traditionally classified in order Creodonta, this group is now classified in its own order Oxyaenodonta ("sharp tooth hyenas") within clade Pan-Carnivora in mirorder Ferae. The group contains four subfamilies comprising fourteen genera. O... | Biology and health sciences | Mammals: General | Animals |
2535167 | https://en.wikipedia.org/wiki/Butternut%20squash | Butternut squash | Butternut squash (Cucurbita moschata), known in Australia and New Zealand as butternut pumpkin or gramma, is a type of winter squash that grows on a vine. It has a sweet, nutty taste similar to that of a pumpkin. It has tan-yellow skin and orange fleshy pulp with a compartment of seeds in the blossom end. When ripening... | Biology and health sciences | Botanical fruits used as culinary vegetables | Plants |
2535591 | https://en.wikipedia.org/wiki/Leafhopper | Leafhopper | Leafhopper is the common name for any species from the family Cicadellidae. These minute insects, colloquially known as hoppers, are plant feeders that suck plant sap from grass, shrubs, or trees. Their hind legs are modified for jumping, and are covered with hairs that facilitate the spreading of a secretion over thei... | Biology and health sciences | Hemiptera (true bugs) | null |
2535858 | https://en.wikipedia.org/wiki/Ice%20giant | Ice giant | An ice giant is a giant planet composed mainly of elements heavier than hydrogen and helium, such as oxygen, carbon, nitrogen, and sulfur. There are two ice giants in the Solar System: Uranus and Neptune.
In astrophysics and planetary science the term "ice" refers to volatile chemical compounds with freezing points ab... | Physical sciences | Planetary science | Astronomy |
2536187 | https://en.wikipedia.org/wiki/Alvarez%20hypothesis | Alvarez hypothesis | The Alvarez hypothesis posits that the mass extinction of the non-avian dinosaurs and many other living things during the Cretaceous–Paleogene extinction event was caused by the impact of a large asteroid on the Earth. Prior to 2013, it was commonly cited as having happened about 65 million years ago, but Renne and col... | Physical sciences | Events | Earth science |
2536716 | https://en.wikipedia.org/wiki/Dental%20extraction | Dental extraction | A dental extraction (also referred to as tooth extraction, exodontia, exodontics, or informally, tooth pulling) is the removal of teeth from the dental alveolus (socket) in the alveolar bone. Extractions are performed for a wide variety of reasons, but most commonly to remove teeth which have become unrestorable throug... | Biology and health sciences | Dental treatments | Health |
38714 | https://en.wikipedia.org/wiki/World | World | The world is the totality of entities, the whole of reality, or everything that exists. The nature of the world has been conceptualized differently in different fields. Some conceptions see the world as unique, while others talk of a "plurality of worlds". Some treat the world as one simple object, while others analyze... | Physical sciences | Physical cosmology | Astronomy |
38722 | https://en.wikipedia.org/wiki/Psychiatric%20hospital | Psychiatric hospital | A psychiatric hospital, also known as a mental health hospital, a behavioral health hospital, or an asylum is a specialized medical facility that focuses on the treatment of severe mental disorders. These institutions cater to patients with conditions such as schizophrenia, bipolar disorder, major depressive disorder, ... | Biology and health sciences | General concepts | null |
38780 | https://en.wikipedia.org/wiki/Mariner%202 | Mariner 2 | Mariner 2 (Mariner-Venus 1962), an American space probe to Venus, was the first robotic space probe to report successfully from a planetary encounter. The first successful spacecraft in the NASA Mariner program, it was a simplified version of the Block I spacecraft of the Ranger program and an exact copy of Mariner 1. ... | Technology | Unmanned spacecraft | null |
38799 | https://en.wikipedia.org/wiki/Galanthus | Galanthus | Galanthus (from Ancient Greek , (, "milk") + (, "flower")), or snowdrop, is a small genus of approximately 20 species of bulbous perennial herbaceous plants in the family Amaryllidaceae. The plants have two linear leaves and a single small white drooping bell-shaped flower with six petal-like (petaloid) tepals in two ... | Biology and health sciences | Asparagales | Plants |
38801 | https://en.wikipedia.org/wiki/Algebraic%20topology | Algebraic topology | Algebraic topology is a branch of mathematics that uses tools from abstract algebra to study topological spaces. The basic goal is to find algebraic invariants that classify topological spaces up to homeomorphism, though usually most classify up to homotopy equivalence.
Although algebraic topology primarily uses algeb... | Mathematics | Algebra | null |
38811 | https://en.wikipedia.org/wiki/Proline | Proline | Proline (symbol Pro or P) is an organic acid classed as a proteinogenic amino acid (used in the biosynthesis of proteins), although it does not contain the amino group but is rather a secondary amine. The secondary amine nitrogen is in the protonated form (NH2+) under biological conditions, while the carboxyl group is... | Biology and health sciences | Amino acids | Biology |
38824 | https://en.wikipedia.org/wiki/Electric%20power%20transmission | Electric power transmission | Electric power transmission is the bulk movement of electrical energy from a generating site, such as a power plant, to an electrical substation. The interconnected lines that facilitate this movement form a transmission network. This is distinct from the local wiring between high-voltage substations and customers, whi... | Technology | Electricity generation and distribution | null |
38829 | https://en.wikipedia.org/wiki/Three-phase%20electric%20power | Three-phase electric power | Three-phase electric power (abbreviated 3ϕ) is a common type of alternating current (AC) used in electricity generation, transmission, and distribution. It is a type of polyphase system employing three wires (or four including an optional neutral return wire) and is the most common method used by electrical grids world... | Technology | Power transmission | null |
38857 | https://en.wikipedia.org/wiki/Lever | Lever | A lever is a simple machine consisting of a beam or rigid rod pivoted at a fixed hinge, or fulcrum. A lever is a rigid body capable of rotating on a point on itself. On the basis of the locations of fulcrum, load and effort, the lever is divided into three types. It is one of the six simple machines identified by Renai... | Technology | Basics_8 | null |
38869 | https://en.wikipedia.org/wiki/Flax | Flax | Flax, also known as common flax or linseed, is a flowering plant, Linum usitatissimum, in the family Linaceae. It is cultivated as a food and fiber crop in regions of the world with temperate climates. In 2022, France produced 75% of the world's supply of flax.
Textiles made from flax are known in English as linen, an... | Biology and health sciences | Malpighiales | null |
38890 | https://en.wikipedia.org/wiki/Natural%20science | Natural science | Natural science is one of the branches of science concerned with the description, understanding and prediction of natural phenomena, based on empirical evidence from observation and experimentation. Mechanisms such as peer review and reproducibility of findings are used to try to ensure the validity of scientific advan... | Physical sciences | Science basics | Basics and measurement |
38892 | https://en.wikipedia.org/wiki/Chat%20room | Chat room | The term chat room, or chatroom (and sometimes group chat; abbreviated as GC), is primarily used to describe any form of synchronous conferencing, occasionally even asynchronous conferencing. The term can thus mean any technology, ranging from real-time online chat and online interaction with strangers (e.g., online fo... | Technology | Internet | null |
38902 | https://en.wikipedia.org/wiki/Brown | Brown | Brown is a shade. It can be considered a composite color, but it is mainly a darker shade of orange. In the CMYK color model used in printing and painting, brown is usually made by combining the colors orange and black.
In the RGB color model used to project colors onto television screens and computer monitors, brown ... | Physical sciences | Color terms | null |
38930 | https://en.wikipedia.org/wiki/Jupiter | Jupiter | Jupiter is the fifth planet from the Sun and the largest in the Solar System. It is a gas giant with a mass more than 2.5 times that of all the other planets in the Solar System combined and slightly less than one-thousandth the mass of the Sun. Its diameter is eleven times that of Earth, and a tenth that of the Sun. J... | Physical sciences | Astronomy | null |
38940 | https://en.wikipedia.org/wiki/Banana | Banana | A banana is an elongated, edible fruit – botanically a berry – produced by several kinds of large treelike herbaceous flowering plants in the genus Musa. In some countries, cooking bananas are called plantains, distinguishing them from dessert bananas. The fruit is variable in size, color and firmness, but is usually e... | Biology and health sciences | Monocots | null |
38945 | https://en.wikipedia.org/wiki/Cooking%20banana | Cooking banana | Cooking bananas are a group of banana cultivars in the genus Musa whose fruits are generally used in cooking. They are not eaten raw and are generally starchy. Many cooking bananas are referred to as plantains (/ˈplæntɪn/, /plænˈteɪn/, /ˈplɑːntɪn/) or 'green bananas'. In botanical usage, the term "plantain" is used onl... | Biology and health sciences | Monocots | null |
38954 | https://en.wikipedia.org/wiki/Inclined%20plane | Inclined plane | An inclined plane, also known as a ramp, is a flat supporting surface tilted at an angle from the vertical direction, with one end higher than the other, used as an aid for raising or lowering a load. The inclined plane is one of the six classical simple machines defined by Renaissance scientists. Inclined planes are u... | Technology | Basics_8 | null |
38979 | https://en.wikipedia.org/wiki/Photosphere | Photosphere | The photosphere is a star's outer shell from which light is radiated. It extends into a star's surface until the plasma becomes opaque, equivalent to an optical depth of approximately , or equivalently, a depth from which 50% of light will escape without being scattered.
A photosphere is the region of a luminous objec... | Physical sciences | Solar System | Astronomy |
38992 | https://en.wikipedia.org/wiki/Cosmological%20constant | Cosmological constant | In cosmology, the cosmological constant (usually denoted by the Greek capital letter lambda: ), alternatively called Einstein's cosmological constant,
is a coefficient that Albert Einstein initially added to his field equations of general relativity. He later removed it; however, much later it was revived to express t... | Physical sciences | Physical cosmology | null |
38993 | https://en.wikipedia.org/wiki/Optical%20depth | Optical depth | In physics, optical depth or optical thickness is the natural logarithm of the ratio of incident to transmitted radiant power through a material.
Thus, the larger the optical depth, the smaller the amount of transmitted radiant power through the material.
Spectral optical depth or spectral optical thickness is the nat... | Physical sciences | Optics | Physics |
38998 | https://en.wikipedia.org/wiki/Vulcanization | Vulcanization | Vulcanization (British English: vulcanisation) is a range of processes for hardening rubbers. The term originally referred exclusively to the treatment of natural rubber with sulfur, which remains the most common practice. It has also grown to include the hardening of other (synthetic) rubbers via various means. Exampl... | Technology | Materials | null |
39007 | https://en.wikipedia.org/wiki/Wall | Wall | A wall is a structure and a surface that defines an area; carries a load; provides security, shelter, or soundproofing; or, is decorative. There are many kinds of walls, including:
Border barriers between countries
Brick walls
Defensive walls in fortifications
Permanent, solid fences
Retaining walls, which hold ba... | Technology | Architectural elements | null |
39029 | https://en.wikipedia.org/wiki/Bamboo | Bamboo | Bamboos are a diverse group of mostly evergreen perennial flowering plants making up the subfamily Bambusoideae of the grass family Poaceae. Giant bamboos are the largest members of the grass family, in the case of Dendrocalamus sinicus having individual stalks (culms) reaching a length of , up to in thickness and a w... | Biology and health sciences | Poales | null |
39059 | https://en.wikipedia.org/wiki/European%20bison | European bison | The European bison (: bison) (Bison bonasus) or the European wood bison, also known as the wisent ( or ), the zubr (), or sometimes colloquially as the European buffalo, is a European species of bison. It is one of two extant species of bison, alongside the American bison. The European bison is the heaviest wild land a... | Biology and health sciences | Artiodactyla | null |
39068 | https://en.wikipedia.org/wiki/Digital%20electronics | Digital electronics | Digital electronics is a field of electronics involving the study of digital signals and the engineering of devices that use or produce them. This is in contrast to analog electronics which work primarily with analog signals. Despite the name, digital electronics designs include important analog design considerations.
... | Technology | Electronics: General | null |
39073 | https://en.wikipedia.org/wiki/Sifaka | Sifaka | A sifaka (; ) is a lemur of the genus Propithecus from the family Indriidae within the order Primates. The common name is an onomatopoeia of their characteristic "shi-fak" alarm call. Like all lemurs, they are found only on the island of Madagascar. All species of sifakas are threatened, ranging from endangered to cri... | Biology and health sciences | Strepsirrhini | Animals |
39136 | https://en.wikipedia.org/wiki/Accelerating%20expansion%20of%20the%20universe | Accelerating expansion of the universe | Observations show that the expansion of the universe is accelerating, such that the velocity at which a distant galaxy recedes from the observer is continuously increasing with time. The accelerated expansion of the universe was discovered in 1998 by two independent projects, the Supernova Cosmology Project and the Hig... | Physical sciences | Physical cosmology | Astronomy |
39137 | https://en.wikipedia.org/wiki/Quintessence%20%28physics%29 | Quintessence (physics) | In physics, quintessence is a hypothetical form of dark energy, more precisely a scalar field minimally coupled to gravity, postulated as an explanation of the observation of an accelerating rate of expansion of the universe. The first example of this scenario was proposed by Ratra and Peebles (1988) and Wetterich (198... | Physical sciences | Physical cosmology | Astronomy |
39159 | https://en.wikipedia.org/wiki/Mace%20%28bludgeon%29 | Mace (bludgeon) | A mace is a blunt weapon, a type of club or virge that uses a heavy head on the end of a handle to deliver powerful strikes. A mace typically consists of a strong, heavy, wooden or metal shaft, often reinforced with metal, featuring a head made of stone, bone, copper, bronze, iron, or steel.
The head of a mace can be ... | Technology | Melee weapons | null |
39184 | https://en.wikipedia.org/wiki/NTFS | NTFS | NT File System (NTFS) (commonly called New Technology File System) is a proprietary journaling file system developed by Microsoft in the 1990s.
It was developed to overcome scalability, security and other limitations with FAT. NTFS adds several features that FAT and HPFS lack, including: access control lists (ACLs); f... | Technology | Data storage and memory | null |
39221 | https://en.wikipedia.org/wiki/Thermodynamic%20free%20energy | Thermodynamic free energy | In thermodynamics, the thermodynamic free energy is one of the state functions of a thermodynamic system. The change in the free energy is the maximum amount of work that the system can perform in a process at constant temperature, and its sign indicates whether the process is thermodynamically favorable or forbidden. ... | Physical sciences | Thermodynamics | null |
39248 | https://en.wikipedia.org/wiki/Limit%20%28category%20theory%29 | Limit (category theory) | In category theory, a branch of mathematics, the abstract notion of a limit captures the essential properties of universal constructions such as products, pullbacks and inverse limits. The dual notion of a colimit generalizes constructions such as disjoint unions, direct sums, coproducts, pushouts and direct limits.
... | Mathematics | Category theory | null |
39316 | https://en.wikipedia.org/wiki/Compass | Compass | A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with magnetic north. Other methods may be used, including gyroscopes, magnetomete... | Technology | Navigation and timekeeping | null |
39330 | https://en.wikipedia.org/wiki/Congruence%20%28geometry%29 | Congruence (geometry) | In geometry, two figures or objects are congruent if they have the same shape and size, or if one has the same shape and size as the mirror image of the other.
More formally, two sets of points are called congruent if, and only if, one can be transformed into the other by an isometry, i.e., a combination of rigid moti... | Mathematics | Geometry: General | null |
39354 | https://en.wikipedia.org/wiki/Uracil | Uracil | Uracil () (symbol U or Ura) is one of the four nucleotide bases in the nucleic acid RNA. The others are adenine (A), cytosine (C), and guanine (G). In RNA, uracil binds to adenine via two hydrogen bonds. In DNA, the uracil nucleobase is replaced by thymine (T). Uracil is a demethylated form of thymine.
Uracil is a com... | Biology and health sciences | Nucleic acids | Biology |
39358 | https://en.wikipedia.org/wiki/Open%20set | Open set | In mathematics, an open set is a generalization of an open interval in the real line.
In a metric space (a set with a distance defined between every two points), an open set is a set that, with every point in it, contains all points of the metric space that are sufficiently near to (that is, all points whose distanc... | Mathematics | Geometry | null |
39374 | https://en.wikipedia.org/wiki/Large%20Magellanic%20Cloud | Large Magellanic Cloud | The Large Magellanic Cloud (LMC) is a dwarf galaxy and satellite galaxy of the Milky Way. At a distance of around , the LMC is the second- or third-closest galaxy to the Milky Way, after the Sagittarius Dwarf Spheroidal ( away) and the possible dwarf irregular galaxy called the Canis Major Overdensity. Based on the D25... | Physical sciences | Notable galaxies | null |
39375 | https://en.wikipedia.org/wiki/Space%20suit | Space suit | A space suit (or spacesuit) is an environmental suit used for protection from the harsh environment of outer space, mainly from its vacuum as a highly specialized pressure suit, but also its temperature extremes, as well as radiation and micrometeoroids. Basic space suits are worn as a safety precaution inside spacecra... | Technology | Basics_6 | null |
39377 | https://en.wikipedia.org/wiki/Similarity%20%28geometry%29 | Similarity (geometry) | In Euclidean geometry, two objects are similar if they have the same shape, or if one has the same shape as the mirror image of the other. More precisely, one can be obtained from the other by uniformly scaling (enlarging or reducing), possibly with additional translation, rotation and reflection. This means that eithe... | Mathematics | Geometry: General | null |
39378 | https://en.wikipedia.org/wiki/Distance | Distance | Distance is a numerical or occasionally qualitative measurement of how far apart objects, points, people, or ideas are. In physics or everyday usage, distance may refer to a physical length or an estimation based on other criteria (e.g. "two counties over"). The term is also frequently used metaphorically to mean a me... | Mathematics | Geometry | null |
39382 | https://en.wikipedia.org/wiki/Infimum%20and%20supremum | Infimum and supremum | In mathematics, the infimum (abbreviated inf; : infima) of a subset of a partially ordered set is the greatest element in that is less than or equal to each element of if such an element exists. If the infimum of exists, it is unique, and if b is a lower bound of , then b is less than or equal to the infimum of . ... | Mathematics | Order theory | null |
39389 | https://en.wikipedia.org/wiki/Pine | Pine | A pine is any conifer tree or shrub in the genus Pinus () of the family Pinaceae. Pinus is the sole genus in the subfamily Pinoideae.
World Flora Online accepts 134 species-rank taxa (119 species and 15 nothospecies) of pines as current, with additional synonyms, and Plants of the World Online 126 species-rank taxa (1... | Biology and health sciences | Gymnosperms | null |
39406 | https://en.wikipedia.org/wiki/Central%20limit%20theorem | Central limit theorem | In probability theory, the central limit theorem (CLT) states that, under appropriate conditions, the distribution of a normalized version of the sample mean converges to a standard normal distribution. This holds even if the original variables themselves are not normally distributed. There are several versions of the ... | Mathematics | Statistics and probability | null |
39407 | https://en.wikipedia.org/wiki/Dirac%20equation | Dirac equation | In particle physics, the Dirac equation is a relativistic wave equation derived by British physicist Paul Dirac in 1928. In its free form, or including electromagnetic interactions, it describes all spin-1/2 massive particles, called "Dirac particles", such as electrons and quarks for which parity is a symmetry. It is ... | Physical sciences | Quantum mechanics | Physics |
39418 | https://en.wikipedia.org/wiki/Moore%27s%20law | Moore's law | Moore's law is the observation that the number of transistors in an integrated circuit (IC) doubles about every two years. Moore's law is an observation and projection of a historical trend. Rather than a law of physics, it is an empirical relationship. It is an experience-curve law, a type of law quantifying efficienc... | Technology | Computer hardware | null |
39420 | https://en.wikipedia.org/wiki/Right%20triangle | Right triangle | A right triangle or right-angled triangle, sometimes called an orthogonal triangle or rectangular triangle, is a triangle in which two sides are perpendicular, forming a right angle ( turn or 90 degrees).
The side opposite to the right angle is called the hypotenuse (side in the figure). The sides adjacent to the rig... | Mathematics | Two-dimensional space | null |
39562 | https://en.wikipedia.org/wiki/Geochemistry | Geochemistry | Geochemistry is the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems such as the Earth's crust and its oceans. The realm of geochemistry extends beyond the Earth, encompassing the entire Solar System, and has made important contributions to the understand... | Physical sciences | Geochemistry | Earth science |
39595 | https://en.wikipedia.org/wiki/Human%20leg | Human leg | The leg is the entire lower limb of the human body, including the foot, thigh or sometimes even the hip or buttock region. The major bones of the leg are the femur (thigh bone), tibia (shin bone), and adjacent fibula. There are 60 bones in each leg.
The thigh is located in between the hip and knee. The calf (rear) an... | Biology and health sciences | Human anatomy | null |
39626 | https://en.wikipedia.org/wiki/Symbiosis | Symbiosis | Symbiosis (Ancient Greek : living with, companionship < : together; and bíōsis: living) is any type of a close and long-term biological interaction, between two organisms of different species. The two organisms, termed symbionts, can be either in a mutualistic, a commensalistic, or a parasitic relationship. In 1879,... | Biology and health sciences | Ecology | null |
39653 | https://en.wikipedia.org/wiki/Dissociative%20identity%20disorder | Dissociative identity disorder | Dissociative identity disorder (DID), previously known as multiple personality disorder (MPD), is one of multiple dissociative disorders in the DSM-5, ICD-11, and Merck Manual. It has a history of extreme controversy.
Dissociative identity disorder is characterized by the presence of at least two distinct and relative... | Biology and health sciences | Mental disorders | Health |
39663 | https://en.wikipedia.org/wiki/Kepler%27s%20Supernova | Kepler's Supernova | SN 1604, also known as Kepler's Supernova, Kepler's Nova or Kepler's Star, was a Type Ia supernova that occurred in the Milky Way, in the constellation Ophiuchus. Appearing in 1604, it is the most recent supernova in the Milky Way galaxy to have been unquestionably observed by the naked eye, occurring no farther than 6... | Physical sciences | Notable transient events | Astronomy |
39666 | https://en.wikipedia.org/wiki/Supernova%20remnant | Supernova remnant | A supernova remnant (SNR) is the structure resulting from the explosion of a star in a supernova. The supernova remnant is bounded by an expanding shock wave, and consists of ejected material expanding from the explosion, and the interstellar material it sweeps up and shocks along the way.
There are two common routes... | Physical sciences | Stellar astronomy | Astronomy |
39669 | https://en.wikipedia.org/wiki/Dengue%20fever | Dengue fever | Dengue fever is a mosquito-borne disease caused by dengue virus, prevalent in tropical and subtropical areas. It is frequently asymptomatic; if symptoms appear they typically begin 3 to 14 days after infection. These may include a high fever, headache, vomiting, muscle and joint pains, and a characteristic skin itching... | Biology and health sciences | Infectious disease | null |
39670 | https://en.wikipedia.org/wiki/Finger%20millet | Finger millet | Finger millet (Eleusine coracana) is an annual herbaceous plant widely grown as a cereal crop in the arid and semiarid areas in Africa and Asia. It is a tetraploid and self-pollinating species probably evolved from its wild relative Eleusine africana.
Finger millet is native to the Ethiopian and Ugandan highlands. Int... | Biology and health sciences | Grains | Plants |
39674 | https://en.wikipedia.org/wiki/Planetary%20nebula | Planetary nebula | A planetary nebula is a type of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from red giant stars late in their lives.
The term "planetary nebula" is a misnomer because they are unrelated to planets. The term originates from the planet-like round shape of these nebulae observed by a... | Physical sciences | Stellar astronomy | null |
39683 | https://en.wikipedia.org/wiki/Banksia | Banksia | Banksia is a genus of around 170 species of flowering plants in the family Proteaceae. These Australian wildflowers and popular garden plants are easily recognised by their characteristic flower spikes, and woody fruiting "cones" and heads. Banksias range in size from prostrate woody shrubs to trees up to 30 metres (10... | Biology and health sciences | Proteales | Plants |
39696 | https://en.wikipedia.org/wiki/Oak | Oak | An oak is a hardwood tree or shrub in the genus Quercus of the beech family. They have spirally arranged leaves, often with lobed edges, and a nut called an acorn, borne within a cup. The genus is widely distributed in the Northern Hemisphere; it includes some 500 species, both deciduous and evergreen. Fossil oaks date... | Biology and health sciences | Fagales | null |
39736 | https://en.wikipedia.org/wiki/Binomial%20nomenclature | Binomial nomenclature | In taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages. Such a name is called a ... | Biology and health sciences | Genetics and taxonomy | null |
39747 | https://en.wikipedia.org/wiki/Stomach | Stomach | The stomach is a muscular, hollow organ in the upper gastrointestinal tract of humans and many other animals, including several invertebrates. The stomach has a dilated structure and functions as a vital organ in the digestive system. The stomach is involved in the gastric phase of digestion, following the cephalic pha... | Biology and health sciences | Digestive system | null |
39776 | https://en.wikipedia.org/wiki/Denial-of-service%20attack | Denial-of-service attack | In computing, a denial-of-service attack (DoS attack) is a cyber-attack in which the perpetrator seeks to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connected to a network. Denial of service is typically accomplished by flooding the ... | Technology | Computer security | null |
39789 | https://en.wikipedia.org/wiki/Rotation | Rotation | Rotation or rotational motion is the circular movement of an object around a central line, known as an axis of rotation. A plane figure can rotate in either a clockwise or counterclockwise sense around a perpendicular axis intersecting anywhere inside or outside the figure at a center of rotation. A solid figure has an... | Physical sciences | Classical mechanics | null |
39792 | https://en.wikipedia.org/wiki/3-sphere | 3-sphere | In mathematics, a hypersphere or 3-sphere is a 4-dimensional analogue of a sphere, and is the 3-dimensional n-sphere. In 4-dimensional Euclidean space, it is the set of points equidistant from a fixed central point. The interior of a 3-sphere is a 4-ball.
It is called a 3-sphere because topologically, the surface itse... | Mathematics | Four-dimensional space | null |
39831 | https://en.wikipedia.org/wiki/Battering%20ram | Battering ram | A battering ram is a siege engine that originated in ancient times and was designed to break open the masonry walls of fortifications or splinter their wooden gates. In its simplest form, a battering ram is just a large, heavy log carried by several people and propelled with force against an obstacle; the ram would be ... | Technology | Artillery and siege | null |
39834 | https://en.wikipedia.org/wiki/Correlation%20does%20not%20imply%20causation | Correlation does not imply causation | The phrase "correlation does not imply causation" refers to the inability to legitimately deduce a cause-and-effect relationship between two events or variables solely on the basis of an observed association or correlation between them. The idea that "correlation implies causation" is an example of a questionable-caus... | Mathematics | Statistics | null |
39878 | https://en.wikipedia.org/wiki/Domain%20name | Domain name | In the Internet, a domain name is a string that identifies a realm of administrative autonomy, authority or control. Domain names are often used to identify services provided through the Internet, such as websites, email services and more. Domain names are used in various networking contexts and for application-specifi... | Technology | Internet | null |
39936 | https://en.wikipedia.org/wiki/Necrosis | Necrosis | Necrosis () is a form of cell injury which results in the premature death of cells in living tissue by autolysis. The term "necrosis" came about in the mid-19th century and is commonly attributed to German pathologist Rudolf Virchow, who is often regarded as one of the founders of modern pathology. Necrosis is caused b... | Biology and health sciences | Cell processes | Biology |
40114 | https://en.wikipedia.org/wiki/Escherichia%20coli | Escherichia coli | Escherichia coli ( ) is a gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms. Most E. coli strains are part of the normal microbiota of the gut, where they constitute about 0.1%, along with other facultat... | Biology and health sciences | Other organisms | null |
40142 | https://en.wikipedia.org/wiki/Botulism | Botulism | Botulism is a rare and potentially fatal illness caused by botulinum toxin, which is produced by the bacterium Clostridium botulinum. The disease begins with weakness, blurred vision, feeling tired, and trouble speaking. This may then be followed by weakness of the arms, chest muscles, and legs. Vomiting, swelling of t... | Biology and health sciences | Infectious disease | null |
40163 | https://en.wikipedia.org/wiki/Darmstadtium | Darmstadtium | Darmstadtium is a synthetic chemical element; it has symbol Ds and atomic number 110. It is extremely radioactive: the most stable known isotope, darmstadtium-281, has a half-life of approximately 14 seconds. Darmstadtium was first created in November 1994 by the GSI Helmholtz Centre for Heavy Ion Research in the city ... | Physical sciences | Group 10 | Chemistry |
40171 | https://en.wikipedia.org/wiki/Lead%28II%29%20azide | Lead(II) azide | Lead(II) azide is an inorganic compound. More so than other azides, it is explosive. It is used in detonators to initiate secondary explosives. In a commercially usable form, it is a white to buff powder.
Preparation and handling
Lead(II) azide is prepared by the reaction of sodium azide and lead(II) nitrate in aque... | Physical sciences | Nitride salts | Chemistry |
40187 | https://en.wikipedia.org/wiki/Conjugate%20%28acid-base%20theory%29 | Conjugate (acid-base theory) | A conjugate acid, within the Brønsted–Lowry acid–base theory, is a chemical compound formed when an acid gives a proton () to a base—in other words, it is a base with a hydrogen ion added to it, as it loses a hydrogen ion in the reverse reaction. On the other hand, a conjugate base is what remains after an acid has do... | Physical sciences | Concepts | Chemistry |
40197 | https://en.wikipedia.org/wiki/Vapor%20pressure | Vapor pressure | Vapor pressure or equilibrium vapor pressure is the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system. The equilibrium vapor pressure is an indication of a liquid's thermodynamic tendency to evaporate. It relates to the balance... | Physical sciences | Thermodynamics | Chemistry |
40203 | https://en.wikipedia.org/wiki/Hubble%20Space%20Telescope | Hubble Space Telescope | The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the first space telescope, but it is one of the largest and most versatile, renowned as a vital research tool and as a public relations boon for astronomy. The Hubble tele... | Technology | Uncrewed spacecraft | null |
40239 | https://en.wikipedia.org/wiki/Geosynchronous%20orbit | Geosynchronous orbit | A geosynchronous orbit (sometimes abbreviated GSO) is an Earth-centered orbit with an orbital period that matches Earth's rotation on its axis, 23 hours, 56 minutes, and 4 seconds (one sidereal day). The synchronization of rotation and orbital period means that, for an observer on Earth's surface, an object in geosynch... | Physical sciences | Orbital mechanics | null |
40282 | https://en.wikipedia.org/wiki/Type%20theory | Type theory | In mathematics and theoretical computer science, a type theory is the formal presentation of a specific type system. Type theory is the academic study of type systems.
Some type theories serve as alternatives to set theory as a foundation of mathematics. Two influential type theories that have been proposed as founda... | Mathematics | Mathematical logic | null |
40283 | https://en.wikipedia.org/wiki/Melting%20point | Melting point | The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depends on pressure and is usually specified at a standard pressure such as 1 atmosp... | Physical sciences | Phase transitions | Physics |
40310 | https://en.wikipedia.org/wiki/Magnetohydrodynamics | Magnetohydrodynamics | In physics and engineering, magnetohydrodynamics (MHD; also called magneto-fluid dynamics or hydromagnetics) is a model of electrically conducting fluids that treats all interpenetrating particle species together as a single continuous medium. It is primarily concerned with the low-frequency, large-scale, magnetic beh... | Physical sciences | Magnetostatics | Physics |
40318 | https://en.wikipedia.org/wiki/Portland%20cement | Portland cement | Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout. It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin, and is usually made from limestone. It is a fine powder... | Technology | Building materials | null |
40323 | https://en.wikipedia.org/wiki/Inertial%20confinement%20fusion | Inertial confinement fusion | Inertial confinement fusion (ICF) is a fusion energy process that initiates nuclear fusion reactions by compressing and heating targets filled with fuel. The targets are small pellets, typically containing deuterium (2H) and tritium (3H).
Energy is deposited in the target's outer layer, which explodes outward. This pr... | Technology | Power generation | null |
40330 | https://en.wikipedia.org/wiki/Magnoliaceae | Magnoliaceae | The Magnoliaceae () are a flowering plant family, the magnolia family, in the order Magnoliales. It consists of two genera: Magnolia and Liriodendron (tulip trees).
Unlike most angiosperms, whose flower parts are in whorls (rings), the Magnoliaceae have their stamens and pistils in spirals on a conical receptacle. Th... | Biology and health sciences | Magnoliales | Plants |
40333 | https://en.wikipedia.org/wiki/Magnolia | Magnolia | Magnolia is a large genus of about 210 to 340 flowering plant species in the subfamily Magnolioideae of the family Magnoliaceae. The natural range of Magnolia species is disjunct, with a main center in east, south and southeast Asia and a secondary center in eastern North America, Central America, the West Indies, and ... | Biology and health sciences | Magnoliales | Plants |
40336 | https://en.wikipedia.org/wiki/Rhododendron | Rhododendron | Rhododendron (; : rhododendra) is a very large genus of about 1,024 species of woody plants and in the heath family (Ericaceae). They can be either evergreen or deciduous. Most species are native to eastern Asia and the Himalayan region, but smaller numbers occur elsewhere in Asia, and in North America, Europe and Aust... | Biology and health sciences | Ericales | null |
40344 | https://en.wikipedia.org/wiki/Semiconductor%20device | Semiconductor device | A semiconductor device is an electronic component that relies on the electronic properties of a semiconductor material (primarily silicon, germanium, and gallium arsenide, as well as organic semiconductors) for its function. Its conductivity lies between conductors and insulators. Semiconductor devices have replaced va... | Technology | Electronics | null |
40345 | https://en.wikipedia.org/wiki/MOSFET | MOSFET | In electronics, the metal–oxide–semiconductor field-effect transistor (MOSFET, MOS-FET, MOS FET, or MOS transistor) is a type of field-effect transistor (FET), most commonly fabricated by the controlled oxidation of silicon. It has an insulated gate, the voltage of which determines the conductivity of the device. This ... | Technology | Semiconductors | null |
40367 | https://en.wikipedia.org/wiki/Analog-to-digital%20converter | Analog-to-digital converter | In electronics, an analog-to-digital converter (ADC, A/D, or A-to-D) is a system that converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a digital signal. An ADC may also provide an isolated measurement such as an electronic device that converts an analog input... | Technology | Signal processing | null |
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