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15165 | https://en.wikipedia.org/wiki/Ivory | Ivory | Ivory is a hard, white material from the tusks (traditionally from elephants) and teeth of animals, that consists mainly of dentine, one of the physical structures of teeth and tusks. The chemical structure of the teeth and tusks of mammals is the same, regardless of the species of origin, but ivory contains structures... | Physical sciences | Organic gemstones | null |
15166 | https://en.wikipedia.org/wiki/Infantry%20fighting%20vehicle | Infantry fighting vehicle | An infantry fighting vehicle (IFV), also known as a mechanized infantry combat vehicle (MICV), is a type of armoured fighting vehicle and armoured personnel carrier used to carry infantry into battle and provide direct-fire support. The 1990 Treaty on Conventional Armed Forces in Europe defines an infantry fighting veh... | Technology | Maneuver | null |
15167 | https://en.wikipedia.org/wiki/ICQ | ICQ | ICQ was a cross-platform instant messaging (IM) and VoIP client founded in June 1996 by Yair Goldfinger, Sefi Vigiser, Amnon Amir, Arik Vardi, and Arik's father, Yossi Vardi. The name ICQ derives from the English phrase "I Seek You". Originally developed by the Israeli company Mirabilis in 1996, the client was bought b... | Technology | Social network and blogging | null |
15201 | https://en.wikipedia.org/wiki/Interdisciplinarity | Interdisciplinarity | Interdisciplinarity or interdisciplinary studies involves the combination of multiple academic disciplines into one activity (e.g., a research project). It draws knowledge from several fields like sociology, anthropology, psychology, economics, etc. It is related to an interdiscipline or an interdisciplinary field, whi... | Physical sciences | Science basics | Basics and measurement |
15215 | https://en.wikipedia.org/wiki/Internet%20Explorer | Internet Explorer | Internet Explorer (formerly Microsoft Internet Explorer and Windows Internet Explorer, commonly abbreviated as IE or MSIE) is a retired series of graphical web browsers developed by Microsoft that were used in the Windows line of operating systems. While IE has been discontinued on most Windows editions, it remains su... | Technology | Browsers | null |
15223 | https://en.wikipedia.org/wiki/Invertebrate | Invertebrate | Invertebrates are animals that neither develop nor retain a vertebral column (commonly known as a spine or backbone), which evolved from the notochord. It is a paraphyletic grouping including all animals excluding the chordate subphylum Vertebrata, i.e. vertebrates. Well-known phyla of invertebrates include arthropods,... | Biology and health sciences | General classification | null |
15250 | https://en.wikipedia.org/wiki/Indigo | Indigo | Indigo is a term used for a number of hues in the region of blue. The word comes from the ancient dye of the same name. The term "indigo" can refer to the color of the dye, various colors of fabric dyed with indigo dye, a spectral color, one of the seven colors of the rainbow as described by Newton, or a region on the... | Physical sciences | Colors | Physics |
15287 | https://en.wikipedia.org/wiki/Series%20%28mathematics%29 | Series (mathematics) | In mathematics, a series is, roughly speaking, an addition of infinitely many terms, one after the other. The study of series is a major part of calculus and its generalization, mathematical analysis. Series are used in most areas of mathematics, even for studying finite structures in combinatorics through generating f... | Mathematics | Analysis | null |
15292 | https://en.wikipedia.org/wiki/Ink | Ink | Ink is a gel, sol, or solution that contains at least one colorant, such as a dye or pigment, and is used to color a surface to produce an image, text, or design. Ink is used for drawing or writing with a pen, brush, reed pen, or quill. Thicker inks, in paste form, are used extensively in letterpress and lithographic p... | Technology | Artist's tools | null |
15317 | https://en.wikipedia.org/wiki/IPv4 | IPv4 | Internet Protocol version 4 (IPv4) is the first version of the Internet Protocol (IP) as a standalone specification. It is one of the core protocols of standards-based internetworking methods in the Internet and other packet-switched networks. IPv4 was the first version deployed for production on SATNET in 1982 and on ... | Technology | Internet | null |
15318 | https://en.wikipedia.org/wiki/IPv6 | IPv6 | Internet Protocol version 6 (IPv6) is the most recent version of the Internet Protocol (IP), the communications protocol that provides an identification and location system for computers on networks and routes traffic across the Internet. IPv6 was developed by the Internet Engineering Task Force (IETF) to deal with the... | Technology | Internet | null |
15323 | https://en.wikipedia.org/wiki/Internet%20Protocol | Internet Protocol | The Internet Protocol (IP) is the network layer communications protocol in the Internet protocol suite for relaying datagrams across network boundaries. Its routing function enables internetworking, and essentially establishes the Internet.
IP has the task of delivering packets from the source host to the destination ... | Technology | Internet | null |
15343 | https://en.wikipedia.org/wiki/Intron | Intron | An intron is any nucleotide sequence within a gene that is not expressed or operative in the final RNA product. The word intron is derived from the term intragenic region, i.e., a region inside a gene. The term intron refers to both the DNA sequence within a gene and the corresponding RNA sequence in RNA transcripts. T... | Biology and health sciences | Molecular biology | Biology |
15352 | https://en.wikipedia.org/wiki/Indistinguishable%20particles | Indistinguishable particles | In quantum mechanics, indistinguishable particles (also called identical or indiscernible particles) are particles that cannot be distinguished from one another, even in principle. Species of identical particles include, but are not limited to, elementary particles (such as electrons), composite subatomic particles (su... | Physical sciences | Statistical mechanics | Physics |
15361 | https://en.wikipedia.org/wiki/Ice%20age | Ice age | An ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages, and greenhouse periods during which there are no glaciers on the planet. Earth is cu... | Physical sciences | Geological history | null |
15412 | https://en.wikipedia.org/wiki/Infrared%20spectroscopy | Infrared spectroscopy | Infrared spectroscopy (IR spectroscopy or vibrational spectroscopy) is the measurement of the interaction of infrared radiation with matter by absorption, emission, or reflection. It is used to study and identify chemical substances or functional groups in solid, liquid, or gaseous forms. It can be used to characterize... | Physical sciences | Spectroscopy | Chemistry |
15417 | https://en.wikipedia.org/wiki/Intermolecular%20force | Intermolecular force | An intermolecular force (IMF; also secondary force) is the force that mediates interaction between molecules, including the electromagnetic forces of attraction
or repulsion which act between atoms and other types of neighbouring particles, e.g. atoms or ions. Intermolecular forces are weak relative to intramolecular f... | Physical sciences | Chemical bonds | null |
15445 | https://en.wikipedia.org/wiki/Entropy%20%28information%20theory%29 | Entropy (information theory) | In information theory, the entropy of a random variable quantifies the average level of uncertainty or information associated with the variable's potential states or possible outcomes. This measures the expected amount of information needed to describe the state of the variable, considering the distribution of probabil... | Mathematics | Information theory | null |
15459 | https://en.wikipedia.org/wiki/International%20Classification%20of%20Diseases | International Classification of Diseases | The International Classification of Diseases (ICD) is a globally used medical classification used in epidemiology, health management and for clinical purposes. The ICD is maintained by the World Health Organization (WHO), which is the directing and coordinating authority for health within the United Nations System. The... | Biology and health sciences | Disease: general classification | Health |
15476 | https://en.wikipedia.org/wiki/Internet%20protocol%20suite | Internet protocol suite | The Internet protocol suite, commonly known as TCP/IP, is a framework for organizing the set of communication protocols used in the Internet and similar computer networks according to functional criteria. The foundational protocols in the suite are the Transmission Control Protocol (TCP), the User Datagram Protocol (UD... | Technology | Internet | null |
15492 | https://en.wikipedia.org/wiki/Imperial%20units | Imperial units | The imperial system of units, imperial system or imperial units (also known as British Imperial or Exchequer Standards of 1826) is the system of units first defined in the British Weights and Measures Act 1824 and continued to be developed through a series of Weights and Measures Acts and amendments.
The imperial syst... | Physical sciences | Measurement systems | null |
15532 | https://en.wikipedia.org/wiki/Integral | Integral | In mathematics, an integral is the continuous analog of a sum, which is used to calculate areas, volumes, and their generalizations. Integration, the process of computing an integral, is one of the two fundamental operations of calculus, the other being differentiation. Integration was initially used to solve problems ... | Mathematics | Calculus and analysis | null |
15642 | https://en.wikipedia.org/wiki/January | January | January is the first month of the year in the Julian and Gregorian calendars. Its length is 31 days. The first day of the month is known as New Year's Day. It is, on average, the coldest month of the year within most of the Northern Hemisphere (where it is the second month of winter) and the warmest month of the year w... | Technology | Months | null |
15651 | https://en.wikipedia.org/wiki/Julian%20calendar | Julian calendar | The Julian calendar is a solar calendar of 365 days in every year with an additional leap day every fourth year (without exception). The Julian calendar is still used as a religious calendar in parts of the Eastern Orthodox Church and in parts of Oriental Orthodoxy as well as by the Amazigh people (also known as the Be... | Technology | Timekeeping | null |
15655 | https://en.wikipedia.org/wiki/Jurassic | Jurassic | The Jurassic ( ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately 143.1 Mya. The Jurassic constitutes the middle period of the Mesozoic Era as well as the eighth period of the Phanerozoic Eon ... | Physical sciences | Geological periods | null |
15785 | https://en.wikipedia.org/wiki/June | June | June—abbreviated Jun—is the sixth month of the year in the Julian and Gregorian calendars—the latter the most widely used calendar in the world. Its length is 30 days. June succeeds May and precedes July. This month marks the start of summer in the Northern Hemisphere and contains the summer solstice, which is the day ... | Technology | Months | null |
15786 | https://en.wikipedia.org/wiki/July | July | July is the seventh month of the year in the Julian and Gregorian calendars. Its length is 31 days. It was named by the Roman Senate in honour of Roman general Julius Caesar in 44 B.C., being the month of his birth. Before then it was called Quintilis, being the fifth month of the calendar that started with March.
It ... | Technology | Months | null |
15881 | https://en.wikipedia.org/wiki/Java%20%28programming%20language%29 | Java (programming language) | Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let programmers write once, run anywhere (WORA), meaning that compiled Java code can run on all platforms that support... | Technology | Programming | null |
15944 | https://en.wikipedia.org/wiki/Jet%20engine | Jet engine | A jet engine is a type of reaction engine, discharging a fast-moving jet of heated gas (usually air) that generates thrust by jet propulsion. While this broad definition may include rocket, water jet, and hybrid propulsion, the term typically refers to an internal combustion air-breathing jet engine such as a turbojet... | Technology | Basics_8 | null |
16009 | https://en.wikipedia.org/wiki/JPEG | JPEG | JPEG ( , short for Joint Photographic Experts Group) is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography. The degree of compression can be adjusted, allowing a selectable trade off between storage size and image quality. JPEG typically achieve... | Technology | File formats | null |
16188 | https://en.wikipedia.org/wiki/Jackal | Jackal | Jackals are canids native to Africa and Eurasia. While the word "" has historically been used for many canines of the subtribe canina, in modern use it most commonly refers to three species: the closely related black-backed jackal (Lupulella mesomelas) and side-striped jackal (Lupulella adusta) of Central and Southern ... | Biology and health sciences | Carnivora | null |
16217 | https://en.wikipedia.org/wiki/Jaguar | Jaguar | The jaguar (Panthera onca) is a large cat species and the only living member of the genus Panthera that is native to the Americas. With a body length of up to and a weight of up to , it is the biggest cat species in the Americas and the third largest in the world. Its distinctively marked coat features pale yellow to ... | Biology and health sciences | Carnivora | null |
16225 | https://en.wikipedia.org/wiki/Jacquard%20machine | Jacquard machine | The Jacquard machine () is a device fitted to a loom that simplifies the process of manufacturing textiles with such complex patterns as brocade, damask and matelassé. The resulting ensemble of the loom and Jacquard machine is then called a Jacquard loom. The machine was patented by Joseph Marie Jacquard in 1804, based... | Technology | Weaving | null |
16290 | https://en.wikipedia.org/wiki/Jerk%20%28physics%29 | Jerk (physics) | Jerk (also known as jolt) is the rate of change of an object's acceleration over time. It is a vector quantity (having both magnitude and direction). Jerk is most commonly denoted by the symbol and expressed in m/s3 (SI units) or standard gravities per second (g0/s).
Expressions
As a vector, jerk can be expressed as... | Physical sciences | Classical mechanics | Physics |
16327 | https://en.wikipedia.org/wiki/Joule | Joule | The joule ( , or ; symbol: J) is the unit of energy in the International System of Units (SI). It is equal to the amount of work done when a force of one newton displaces a mass through a distance of one metre in the direction of that force. It is also the energy dissipated as heat when an electric current of one ampe... | Physical sciences | Energy, power, force and pressure | null |
16389 | https://en.wikipedia.org/wiki/Java%20virtual%20machine | Java virtual machine | A Java virtual machine (JVM) is a virtual machine that enables a computer to run Java programs as well as programs written in other languages that are also compiled to Java bytecode. The JVM is detailed by a specification that formally describes what is required in a JVM implementation. Having a specification ensures i... | Technology | Virtualization | null |
16421 | https://en.wikipedia.org/wiki/Kennedy%20Space%20Center | Kennedy Space Center | The John F. Kennedy Space Center (KSC, originally known as the NASA Launch Operations Center), located on Merritt Island, Florida, is one of the National Aeronautics and Space Administration's (NASA) ten field centers. Since 1968, KSC has been NASA's primary launch center of American spaceflight, research, and technolo... | Technology | Programs and launch sites | null |
16472 | https://en.wikipedia.org/wiki/Jet%20stream | Jet stream | Jet streams are fast flowing, narrow air currents in the Earth's atmosphere.
The main jet streams are located near the altitude of the tropopause and are westerly winds, flowing west to east around the globe. The northern hemisphere and the southern hemisphere each have a polar jet around their respective polar vortex... | Physical sciences | Winds | null |
16619 | https://en.wikipedia.org/wiki/Kilogram | Kilogram | The kilogram (also spelled kilogramme) is the base unit of mass in the International System of Units (SI), having the unit symbol kg. 'Kilogram' means 'one thousand grams' and is colloquially abbreviated to kilo.
The kilogram is an SI base unit, defined ultimately in terms of three defining constants of the SI, namel... | Physical sciences | Mass | null |
16622 | https://en.wikipedia.org/wiki/Knitting | Knitting | Knitting is a method for production of textile fabrics by interlacing yarn loops with loops of the same or other yarns. It is used to create many types of garments. Knitting may be done by hand or by machine.
Knitting creates stitches: loops of yarn in a row; they can be either on straight flat needles or in the round... | Technology | Techniques_2 | null |
16629 | https://en.wikipedia.org/wiki/KDE | KDE | KDE is an international free software community that develops free and open-source software. As a central development hub, it provides tools and resources that enable collaborative work on its projects. Its products include the Plasma Desktop, KDE Frameworks, and a range of applications such as Kate, digiKam, and Krita... | Technology | System | null |
16745 | https://en.wikipedia.org/wiki/Kenyanthropus | Kenyanthropus | Kenyanthropus is a genus of extinct hominin identified from the Lomekwi site by Lake Turkana, Kenya, dated to 3.3 to 3.2 million years ago during the Middle Pliocene. It contains one species, K. platyops, but may also include the 2 million year old Homo rudolfensis, or K. rudolfensis. Before its naming in 2001, Austral... | Biology and health sciences | Australopithecines | Biology |
16759 | https://en.wikipedia.org/wiki/Kevlar | Kevlar | Kevlar (para-aramid) is a strong, heat-resistant synthetic fiber, related to other aramids such as Nomex and Technora. Developed by Stephanie Kwolek at DuPont in 1965, the high-strength material was first used commercially in the early 1970s as a replacement for steel in racing tires. It is typically spun into ropes or... | Technology | Fabrics and fibers | null |
16794 | https://en.wikipedia.org/wiki/Kilobyte | Kilobyte | The kilobyte is a multiple of the unit byte for digital information.
The International System of Units (SI) defines the prefix kilo as a multiplication factor of 1000 (103); therefore, one kilobyte is 1000 bytes. The internationally recommended unit symbol for the kilobyte is kB.
In some areas of information technolo... | Physical sciences | Information | Basics and measurement |
16796 | https://en.wikipedia.org/wiki/Kuiper%20belt | Kuiper belt | The Kuiper belt ( ) is a circumstellar disc in the outer Solar System, extending from the orbit of Neptune at 30 astronomical units (AU) to approximately 50 AU from the Sun. It is similar to the asteroid belt, but is far larger—20 times as wide and 20–200 times as massive. Like the asteroid belt, it consists mainly of ... | Physical sciences | Solar System | null |
16803 | https://en.wikipedia.org/wiki/Ketone | Ketone | In organic chemistry, a ketone is an organic compound with the structure , where R and R' can be a variety of carbon-containing substituents. Ketones contain a carbonyl group (a carbon-oxygen double bond C=O). The simplest ketone is acetone (where R and R' is methyl), with the formula . Many ketones are of great impo... | Physical sciences | Carbon–oxygen bond | null |
16848 | https://en.wikipedia.org/wiki/Kurtosis | Kurtosis | In probability theory and statistics, kurtosis (from , kyrtos or kurtos, meaning "curved, arching") refers to the degree of “tailedness” in the probability distribution of a real-valued random variable. Similar to skewness, kurtosis provides insight into specific characteristics of a distribution. Various methods exis... | Mathematics | Probability | null |
16933 | https://en.wikipedia.org/wiki/Kainite | Kainite | Kainite ( or ) (KMg(SO4)Cl·3H2O) is an evaporite mineral in the class of "Sulfates (selenates, etc.) with additional anions, with H2O" according to the Nickel–Strunz classification. It is a hydrated potassium-magnesium sulfate-chloride, naturally occurring in irregular granular masses or as crystalline coatings in cavi... | Physical sciences | Sedimentary rocks | Earth science |
16938 | https://en.wikipedia.org/wiki/Kaolinite | Kaolinite | Kaolinite ( ; also called kaolin) is a clay mineral, with the chemical composition Al2Si2O5(OH)4. It is a layered silicate mineral, with one tetrahedral sheet of silica () linked through oxygen atoms to one octahedral sheet of alumina ().
Kaolinite is a soft, earthy, usually white, mineral (dioctahedral phyllosilicate... | Physical sciences | Mineralogy | null |
16948 | https://en.wikipedia.org/wiki/Ketamine | Ketamine | Ketamine is a dissociative anesthetic used medically for induction and maintenance of anesthesia. It is also used as a treatment for depression and in pain management. Ketamine is an NMDA receptor antagonist which accounts for most of its psychoactive effects.
At anesthetic doses, ketamine induces a state of dissociat... | Biology and health sciences | Anesthetics | Health |
16976 | https://en.wikipedia.org/wiki/Kernite | Kernite | Kernite, also known as rasorite, is a hydrated sodium borate hydroxide mineral with formula . It is a colorless to white mineral crystallizing in the monoclinic crystal system typically occurring as prismatic to acicular crystals or granular masses. It is relatively soft with Mohs hardness of 2.5 to 3 and light with a ... | Physical sciences | Minerals | Earth science |
16992 | https://en.wikipedia.org/wiki/Kerosene | Kerosene | Kerosene, or paraffin, is a combustible hydrocarbon liquid which is derived from petroleum. It is widely used as a fuel in aviation as well as households. Its name derives from (kērós) meaning "wax", and was registered as a trademark by Nova Scotia geologist and inventor Abraham Gesner in 1854 before evolving into a g... | Technology | Energy and fuel | null |
17001 | https://en.wikipedia.org/wiki/Kohlrabi | Kohlrabi | Kohlrabi (; pronounced in English; scientific name Brassica oleracea Gongylodes Group), also called German turnip or turnip cabbage, is a biennial vegetable, a low, stout cultivar of wild cabbage. It is a cultivar of the same species as cabbage, broccoli, cauliflower, kale, Brussels sprouts, collard greens, Savoy cabb... | Biology and health sciences | Brassicales | null |
17003 | https://en.wikipedia.org/wiki/Tettigoniidae | Tettigoniidae | Insects in the family Tettigoniidae are commonly called katydids (especially in North America) or bush crickets. They have previously been known as "long-horned grasshoppers". More than 8,000 species are known. Part of the suborder Ensifera, the Tettigoniidae are the only extant (living) family in the superfamily Tetti... | Biology and health sciences | Orthoptera | null |
9690915 | https://en.wikipedia.org/wiki/Heteropteryx | Heteropteryx | Heteropteryx is a monotypic genus of stick insects containing Heteropteryx dilatata as the only described species. and gives its name to the family of the Heteropterygidae. Their only species may be known as jungle nymph, Malaysian stick insect, Malaysian wood nymph, Malayan jungle nymph, or Malayan wood nymph and beca... | Biology and health sciences | Insects: General | Animals |
9697733 | https://en.wikipedia.org/wiki/Contact%20mechanics | Contact mechanics | Contact mechanics is the study of the deformation of solids that touch each other at one or more points. A central distinction in contact mechanics is between stresses acting perpendicular to the contacting bodies' surfaces (known as normal stress) and frictional stresses acting tangentially between the surfaces (shear... | Physical sciences | Solid mechanics | Physics |
4301763 | https://en.wikipedia.org/wiki/Grain%20growth | Grain growth | In materials science, grain growth is the increase in size of grains (crystallites) in a material at high temperature. This occurs when recovery and recrystallisation are complete and further reduction in the internal energy can only be achieved by reducing the total area of grain boundary. The term is commonly used in... | Physical sciences | Crystallography | Physics |
4302166 | https://en.wikipedia.org/wiki/Explosively%20formed%20penetrator | Explosively formed penetrator | An explosively formed penetrator (EFP), also known as an explosively formed projectile, a self-forging warhead, or a self-forging fragment, is a special type of shaped charge designed to penetrate armor effectively, from a much greater standoff range than standard shaped charges, which are more limited by standoff dist... | Technology | Explosive weapons | null |
4303245 | https://en.wikipedia.org/wiki/Fractus%20cloud | Fractus cloud | Fractus clouds, also called fractostratus or fractocumulus, are small, ragged cloud fragments that are usually found under an ambient cloud base. They form or have broken off from a larger cloud, and are generally sheared by strong winds, giving them a jagged, shredded appearance. Fractus have irregular patterns, appea... | Physical sciences | Clouds | Earth science |
4303674 | https://en.wikipedia.org/wiki/Deposition%20%28phase%20transition%29 | Deposition (phase transition) | Deposition is the phase transition in which gas transforms into solid without passing through the liquid phase. Deposition is a thermodynamic process. The reverse of deposition is sublimation and hence sometimes deposition is called desublimation.
Applications
Examples
One example of deposition is the process by whi... | Physical sciences | Phase transitions | Physics |
5728727 | https://en.wikipedia.org/wiki/Nereididae | Nereididae | Nereididae (formerly spelled Nereidae) are a family of polychaete worms. It contains about 500 – mostly marine – species grouped into 42 genera. They may be commonly called ragworms or clam worms.
Characteristics
The prostomium of Nereididae bears a pair of palps that are differentiated into two units. The proximal u... | Biology and health sciences | Lophotrochozoa | Animals |
5731588 | https://en.wikipedia.org/wiki/UBV%20photometric%20system | UBV photometric system |
The UBV photometric system (from Ultraviolet, Blue, Visual), also called the Johnson system (or Johnson-Morgan system), is a photometric system usually employed for classifying stars according to their colors.
It was the first standardized photometric system. The apparent magnitudes of stars in the system are often... | Physical sciences | Basics | Astronomy |
5732230 | https://en.wikipedia.org/wiki/Prolibytherium | Prolibytherium | Prolibytherium is an extinct genus of prolibytheriid artiodactyl ungulate native to Middle Miocene North Africa and Pakistan, from around 16.9 to 15.97 million years ago. Fossils of Prolibytherium were found in the Marada Formation of Libya, Vihowa Formation of Pakistan, and the Moghara Formation of Egypt.
Descriptio... | Biology and health sciences | Giraffidae | Animals |
5732414 | https://en.wikipedia.org/wiki/Sivatherium | Sivatherium | Sivatherium ("Shiva's beast", from Shiva and therium, Latinized form of Ancient Greek θηρίον - thēríon) is an extinct genus of giraffid that ranged throughout Africa and Eurasia. The species Sivatherium giganteum is, by weight, one of the largest giraffids known, and also one of the largest ruminants of all time.
Siva... | Biology and health sciences | Giraffidae | Animals |
5732433 | https://en.wikipedia.org/wiki/Curved%20mirror | Curved mirror | A curved mirror is a mirror with a curved reflecting surface. The surface may be either convex (bulging outward) or concave (recessed inward). Most curved mirrors have surfaces that are shaped like part of a sphere, but other shapes are sometimes used in optical devices. The most common non-spherical type are parabolic... | Physical sciences | Optics | Physics |
3158838 | https://en.wikipedia.org/wiki/Asparagaceae | Asparagaceae | Asparagaceae (), known as the asparagus family, is a family of flowering plants, placed in the order Asparagales of the monocots. The family name is based on the edible garden asparagus, Asparagus officinalis. This family includes both common garden plants as well as common houseplants. The garden plants include aspa... | Biology and health sciences | Asparagales | Plants |
3159140 | https://en.wikipedia.org/wiki/Pigeon%20post | Pigeon post | Pigeon post is the use of homing pigeons to carry messages. Pigeons are effective as messengers due to their natural homing abilities. The pigeons are transported to a destination in cages, where they are attached with messages, then the pigeon naturally flies back to its home where the recipient could read the message... | Technology | Media and communication: Basics | null |
3160379 | https://en.wikipedia.org/wiki/Organ%20printing | Organ printing | Organ printing utilizes techniques similar to conventional 3D printing where a computer model is fed into a printer that lays down successive layers of plastics or wax until a 3D object is produced. In the case of organ printing, the material being used by the printer is a biocompatible plastic. The biocompatible plast... | Technology | Biotechnology | null |
3160714 | https://en.wikipedia.org/wiki/Teratornithidae | Teratornithidae | Teratornithidae is an extinct family of very large birds of prey that lived in North and South America from the Late Oligocene to Late Pleistocene. They include some of the largest known flying birds. Its members are known as teratorns.
Taxonomy
Teratornithidae are related to New World vultures (Cathartidae, syn. Vul... | Biology and health sciences | Prehistoric birds | Animals |
3161666 | https://en.wikipedia.org/wiki/TW%20Hydrae | TW Hydrae | TW Hydrae is a T Tauri star approximately 196 light-years away in the constellation of Hydra (the Sea Serpent). TW Hydrae is about 80% of the mass of the Sun, but is only about 5-10 million years old. The star appears to be accreting from a protoplanetary disk of dust and gas, oriented face-on to Earth, which has been ... | Physical sciences | Notable stars | Astronomy |
3164495 | https://en.wikipedia.org/wiki/Australopithecus%20bahrelghazali | Australopithecus bahrelghazali | Australopithecus bahrelghazali is an extinct species of australopithecine discovered in 1995 at Koro Toro, Bahr el Gazel, Chad, existing around 3.5 million years ago in the Pliocene. It is the first and only australopithecine known from Central Africa, and demonstrates that this group was widely distributed across Afri... | Biology and health sciences | Australopithecines | Biology |
635484 | https://en.wikipedia.org/wiki/Stinger | Stinger | A stinger (or sting) is a sharp organ found in various animals (typically insects and other arthropods) capable of injecting venom, usually by piercing the epidermis of another animal.
An insect sting is complicated by its introduction of venom, although not all stings are venomous. Bites, which can introduce saliv... | Biology and health sciences | Integumentary system | Biology |
635489 | https://en.wikipedia.org/wiki/Olfactory%20system | Olfactory system | The olfactory system, is the sensory system used for the sense of smell (olfaction). Olfaction is one of the special senses directly associated with specific organs. Most mammals and reptiles have a main olfactory system and an accessory olfactory system. The main olfactory system detects airborne substances, while the... | Biology and health sciences | Nervous system | null |
635490 | https://en.wikipedia.org/wiki/Auditory%20system | Auditory system | The auditory system is the sensory system for the sense of hearing. It includes both the sensory organs (the ears) and the auditory parts of the sensory system.
System overview
The outer ear funnels sound vibrations to the eardrum, increasing the sound pressure in the middle frequency range. The middle-ear ossicles ... | Biology and health sciences | Nervous system | null |
636035 | https://en.wikipedia.org/wiki/Convection%20oven | Convection oven | A convection oven (also known as a fan-assisted oven, turbo broiler or simply a fan oven or turbo) is an oven that has fans to circulate air around food to create an evenly heated environment. In an oven without a fan, natural convection circulates hot air unevenly, so that it will be cooler at the bottom and hotter at... | Technology | Household appliances | null |
636094 | https://en.wikipedia.org/wiki/Irreversible%20process | Irreversible process | In science, a process that is not reversible is called irreversible. This concept arises frequently in thermodynamics. All complex natural processes are irreversible, although a phase transition at the coexistence temperature (e.g. melting of ice cubes in water) is well approximated as reversible.
In thermodynamics, a... | Physical sciences | Thermodynamics | Physics |
636219 | https://en.wikipedia.org/wiki/Pressure%20vessel | Pressure vessel | A pressure vessel is a container designed to hold gases or liquids at a pressure substantially different from the ambient pressure.
Construction methods and materials may be chosen to suit the pressure application, and will depend on the size of the vessel, the contents, working pressure, mass constraints, and the num... | Technology | Containers | null |
636225 | https://en.wikipedia.org/wiki/Thrust%20reversal | Thrust reversal | Thrust reversal, also called reverse thrust, is the temporary diversion of an aircraft engine's thrust for it to act against the forward travel of the aircraft, providing deceleration. Thrust reverser systems are featured on many jet aircraft to help slow down just after touch-down, reducing wear on the brakes and ena... | Technology | Aircraft components | null |
636268 | https://en.wikipedia.org/wiki/Botnet | Botnet | A botnet is a group of Internet-connected devices, each of which runs one or more bots. Botnets can be used to perform distributed denial-of-service (DDoS) attacks, steal data, send spam, and allow the attacker to access the device and its connection. The owner can control the botnet using command and control (C&C) sof... | Technology | Computer security | null |
636831 | https://en.wikipedia.org/wiki/Bungarus | Bungarus | Bungarus (commonly known as kraits ) is a genus of venomous snakes in the family Elapidae. The genus is native to Asia. Often found on the floor of tropical forests in South Asia, Southeast Asia and Southern China, they are medium-sized, highly venomous snakes with a total length (including tail) typically not exceedin... | Biology and health sciences | Snakes | Animals |
636929 | https://en.wikipedia.org/wiki/Dromaeosauridae | Dromaeosauridae | Dromaeosauridae () is a family of feathered coelurosaurian theropod dinosaurs. They were generally small to medium-sized feathered carnivores that flourished in the Cretaceous Period. The name Dromaeosauridae means 'running lizards', from Greek (), meaning 'running at full speed', 'swift', and (), meaning 'lizard'. I... | Biology and health sciences | Theropods | Animals |
637102 | https://en.wikipedia.org/wiki/Plant%20physiology | Plant physiology | Plant physiology is a subdiscipline of botany concerned with the functioning, or physiology, of plants.
Plant physiologists study fundamental processes of plants, such as photosynthesis, respiration, plant nutrition, plant hormone functions, tropisms, nastic movements, photoperiodism, photomorphogenesis, circadian rhy... | Biology and health sciences | Basics | Biology |
637333 | https://en.wikipedia.org/wiki/Dentures | Dentures | Dentures (also known as false teeth) are prosthetic devices constructed to replace missing teeth, supported by the surrounding soft and hard tissues of the oral cavity. Conventional dentures are removable (removable partial denture or complete denture). However, there are many denture designs, some of which rely on bon... | Technology | Devices | null |
637512 | https://en.wikipedia.org/wiki/Nosebleed | Nosebleed | A nosebleed, also known as epistaxis, is an instance of bleeding from the nose. Blood can flow down into the stomach, and cause nausea and vomiting. In more severe cases, blood may come out of both nostrils. Rarely, bleeding may be so significant that low blood pressure occurs. Blood may also be forced to flow up and t... | Biology and health sciences | Types | Health |
14828359 | https://en.wikipedia.org/wiki/Pulse%20%28physics%29 | Pulse (physics) | In physics, a pulse is a generic term describing a single disturbance that moves through a transmission medium. This medium may be vacuum (in the case of electromagnetic radiation) or matter, and may be indefinitely large or finite.
Pulse reflection
Consider a pulse moving through a medium - perhaps through a rope or ... | Physical sciences | Waves | Physics |
364976 | https://en.wikipedia.org/wiki/Bolide | Bolide | A bolide is normally taken to mean an exceptionally bright meteor, but the term is subject to more than one definition, according to context. It may refer to any large crater-forming body, or to one that explodes in the atmosphere. It can be a synonym for a fireball, sometimes specific to those with an apparent magnitu... | Physical sciences | Planetary science | Astronomy |
365101 | https://en.wikipedia.org/wiki/Sciatica | Sciatica | Sciatica is pain going down the leg from the lower back. This pain may go down the back, outside, or front of the leg. Onset is often sudden following activities such as heavy lifting, though gradual onset may also occur. The pain is often described as shooting. Typically, symptoms are only on one side of the body. Cer... | Biology and health sciences | Types | Health |
365159 | https://en.wikipedia.org/wiki/CIELAB%20color%20space | CIELAB color space | The CIELAB color space, also referred to as L*a*b*, is a color space defined by the International Commission on Illumination (abbreviated CIE) in 1976. It expresses color as three values: L* for perceptual lightness and a* and b* for the four unique colors of human vision: red, green, blue and yellow. CIELAB was inten... | Physical sciences | Basics | Physics |
365196 | https://en.wikipedia.org/wiki/Beetroot | Beetroot | The beetroot (British English) or beet (North American English) is the taproot portion of a Beta vulgaris subsp. vulgaris plant in the Conditiva Group. The plant is a root vegetable also known as the table beet, garden beet, dinner beet, or else categorized by color: red beet or golden beet. It is also a leaf vegetable... | Biology and health sciences | Caryophyllales | null |
365435 | https://en.wikipedia.org/wiki/Crystallite | Crystallite | A crystallite is a small or even microscopic crystal which forms, for example, during the cooling of many materials. Crystallites are also referred to as grains.
Bacillite is a type of crystallite. It is rodlike with parallel longulites.
Structure
The orientation of crystallites can be random with no preferred dire... | Physical sciences | Solid mechanics | Physics |
365558 | https://en.wikipedia.org/wiki/Nicotinamide%20adenine%20dinucleotide | Nicotinamide adenine dinucleotide | Nicotinamide adenine dinucleotide (NAD) is a coenzyme central to metabolism. Found in all living cells, NAD is called a dinucleotide because it consists of two nucleotides joined through their phosphate groups. One nucleotide contains an adenine nucleobase and the other, nicotinamide. NAD exists in two forms: an oxidiz... | Biology and health sciences | Coenzymes | Biology |
365765 | https://en.wikipedia.org/wiki/Machining | Machining | Machining is a manufacturing process where a desired shape or part is created using the controlled removal of material, most often metal, from a larger piece of raw material by cutting. Machining is a form of subtractive manufacturing, which utilizes machine tools, in contrast to additive manufacturing (e.g. 3D printin... | Technology | Metallurgy | null |
365876 | https://en.wikipedia.org/wiki/Distribution%20function%20%28physics%29 | Distribution function (physics) | In molecular kinetic theory in physics, a system's distribution function is a function of seven variables, , which gives the number of particles per unit volume in single-particle phase space. It is the number of particles per unit volume having approximately the velocity near the position and time . The usual normal... | Physical sciences | Statistical mechanics | Physics |
365938 | https://en.wikipedia.org/wiki/Germline | Germline | In biology and genetics, the germline is the population of a multicellular organism's cells that develop into germ cells. In other words, they are the cells that form gametes (eggs and sperm), which can come together to form a zygote. They differentiate in the gonads from primordial germ cells into gametogonia, which d... | Biology and health sciences | Biological reproduction | Biology |
366112 | https://en.wikipedia.org/wiki/Chikungunya | Chikungunya | Chikungunya is an infection caused by the Alphavirus chikungunya (CHIKV). The disease was first identified in 1952 in Tanzania and named based on the Kimakonde words for "to become contorted".
Symptoms include fever and joint pain. These typically occur two to twelve days after exposure. Other symptoms may include he... | Biology and health sciences | Viral diseases | Health |
366168 | https://en.wikipedia.org/wiki/Mesoplodon | Mesoplodon | Mesoplodont whales are 16 species of toothed whale in the genus Mesoplodon, making it the largest genus in the cetacean order. Two species were described as recently as 1991 (pygmy beaked whale) and 2002 (Perrin's beaked whale), and marine biologists predict the discovery of more species in the future. A new species ... | Biology and health sciences | Toothed whale | Animals |
366273 | https://en.wikipedia.org/wiki/Brickwork | Brickwork | Brickwork is masonry produced by a bricklayer, using bricks and mortar. Typically, rows of bricks called courses are laid on top of one another to build up a structure such as a brick wall.
Bricks may be differentiated from blocks by size. For example, in the UK a brick is defined as a unit having dimensions less than... | Technology | Building materials | null |
366445 | https://en.wikipedia.org/wiki/Mathematical%20puzzle | Mathematical puzzle | Mathematical puzzles make up an integral part of recreational mathematics. They have specific rules, but they do not usually involve competition between two or more players. Instead, to solve such a puzzle, the solver must find a solution that satisfies the given conditions. Mathematical puzzles require mathematics to ... | Mathematics | Basics | null |
366555 | https://en.wikipedia.org/wiki/Biomolecule | Biomolecule | A biomolecule or biological molecule is loosely defined as a molecule produced by a living organism and essential to one or more typically biological processes. Biomolecules include large macromolecules such as proteins, carbohydrates, lipids, and nucleic acids, as well as small molecules such as vitamins and hormones.... | Biology and health sciences | Biochemistry and molecular biology | null |
366723 | https://en.wikipedia.org/wiki/Indeterminate%20form | Indeterminate form | Indeterminate form is a mathematical expression that can obtain any value depending on circumstances. In calculus, it is usually possible to compute the limit of the sum, difference, product, quotient or power of two functions by taking the corresponding combination of the separate limits of each respective function. F... | Mathematics | Basics_2 | null |
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