18-letter words containing a, s, g
- ethnopsychological — Relating to ethnopsychology.
- euclid's algorithm — (algorithm) (Or "Euclidean Algorithm") An algorithm for finding the greatest common divisor (GCD) of two numbers. It relies on the identity gcd(a, b) = gcd(a-b, b) To find the GCD of two numbers by this algorithm, repeatedly replace the larger by subtracting the smaller from it until the two numbers are equal. E.g. 132, 168 -> 132, 36 -> 96, 36 -> 60, 36 -> 24, 36 -> 24, 12 -> 12, 12 so the GCD of 132 and 168 is 12. This algorithm requires only subtraction and comparison operations but can take a number of steps proportional to the difference between the initial numbers (e.g. gcd(1, 1001) will take 1000 steps).
- evolution strategy — (ES) A kind of evolutionary algorithm where individuals (potential solutions) are encoded by a set of real-valued "object variables" (the individual's "genome"). For each object variable an individual also has a "strategy variable" which determines the degree of mutation to be applied to the corresponding object variable. The strategy variables also mutate, allowing the rate of mutation of the object variables to vary. An ES is characterised by the population size, the number of offspring produced in each generation and whether the new population is selected from parents and offspring or only from the offspring. ES were invented in 1963 by Ingo Rechenberg, Hans-Paul Schwefel at the Technical University of Berlin (TUB) while searching for the optimal shapes of bodies in a flow.
- exercise programme — a programme detailing a range of physical exercises and the amount of time each exercise should be performed, used especially in gymnasiums, where they are typically tailored to individuals' needs
- exhaustive testing — (programming) Executing a program with all possible combinations of inputs or values for program variables.
- fallot's tetralogy — a congenital heart disease in which there are four defects: pulmonary stenosis, enlarged right ventricle, a ventricular septal defect, and an aorta whose origin lies over the septal defect. In babies suffering this disease the defects can be corrected by surgery
- far eastern region — former name of Khabarovsk.
- farewell-to-spring — a slender, showy plant, Clarkia amoena, of the evening primrose family, native to western North America, having satiny, cup-shaped, lilac-crimson or reddish-pink flowers and roundish fruit.
- feeping creaturism — /fee'ping kree"ch*r-izm/ A deliberate spoonerism for creeping featurism, meant to imply that the system or program in question has become a misshapen creature of hacks. This term isn"t really well defined, but it sounds so neat that most hackers have said or heard it. It is probably reinforced by an image of terminals prowling about in the dark making their customary noises.
- fibrocartilaginous — a type of cartilage having a large number of fibers.
- flash butt welding — a method of welding metal edge-to-edge with a powerful electric flash followed by the application of pressure.
- forwarding address — address for mail to be sent on
- foundling hospital — an institutional home for foundlings.
- fracture toughness — The fracture toughness of a material is how likely it is to resist fracture.
- fragile x syndrome — a widespread form of mental retardation caused by a faulty gene on the X chromosome.
- fragile-x syndrome — an inherited condition characterized by learning disability: affected individuals have an X-chromosome that is easily damaged under certain conditions
- frederick douglass — Frederick, 1817–95, U.S. ex-slave, abolitionist, and orator.
- fuel-saving device — a device that increases the fuel efficiency of a vehicle, so that it uses less fuel for a further distance
- functional testing — (testing) (Or "black-box testing", "closed-box testing") The application of test data derived from functional requirements without regard to how the system is implemented.
- funding operations — the conversion of government floating stock or short-term debt into holdings of long-term bonds
- furnishing fabrics — fabrics used to make and cover furniture
- galilean satellite — any of the four large satellites of the planet Jupiter – Io, Europa, Ganymede, or Callisto – discovered in 1610 by Galileo
- galilean telescope — a refracting telescope that forms an erect image, consisting of an objective of relatively long focal length that causes light rays to converge and an eyepiece of short focal length that causes them to diverge.
- galvanic corrosion — Galvanic corrosion is a type of corrosion caused by bringing together two different metals, one of which corrodes more rapidly than it would alone while the other corrodes less rapidly.
- gamal abdel nasser — Gamal Abdel [guh-mahl ab-doo l,, juh-] /gəˈmɑl ˈæb dʊl,, dʒə-/ (Show IPA), 1918–70, Egyptian military and political leader: prime minister of Egypt 1954–56; president of Egypt 1956–58; president of the United Arab Republic 1958–70.
- gamblers anonymous — an organization that holds group meetings to help people who are addicted to gambling
- gamma distribution — a continuous two-parameter distribution from which the chi-square and exponential distributions are derived, written Gamma (α. β), where α and β are greater than zero, and defined in terms of the gamma function
- garden loosestrife — any of various plants belonging to the genus Lysimachia, of the primrose family, having clusters of usually yellow flowers, as L. vulgaris (garden loosestrife) or L. quadrifolia (whorled loosestrife)
- gas chromatography — a chromatograph used for the separation of volatile substances.
- gas plasma display — (electronics) A type of display containing super-energised neon gas, used mostly in flat monitor and television screens. Each pixel has a transistor that controls its colour and brightness.
- gas-cooled reactor — a nuclear reactor using a gas as the coolant. In the Mark I type the coolant is carbon dioxide, the moderator is graphite, and the fuel is uranium cased in magnox
- gas-discharge tube — any tube in which an electric discharge takes place through a gas
- gas-permeable lens — a semisoft contact lens, usually removed each day, that allows air to pass through to the eye and affords a wider range of vision corrections than a soft contact lens.
- gastroduodenostomy — See under gastroenterostomy.
- gastroenterologist — the study of the structure, functions, and diseases of digestive organs.
- general anesthesia — induced unconsciousness
- general confession — a prayer confessing sins
- general precession — the precession that results from both lunisolar precession and planetary precession; precession of the equinoxes.
- general san martin — a city in E Argentina, a suburb of Buenos Aires.
- generating station — a power station
- genetic algorithms — genetic algorithm
- geneva conventions — one of a series of international agreements, first made in Geneva, Switzerland, in 1864, establishing rules for the humane treatment of prisoners of war and of the sick, the wounded, and the dead in battle.
- gensym corporation — (company) A company that supplies software and services for intelligent operations management. Common applications include quality management, process optimisation, dynamic scheduling, network management, energy and environmental management, and process modelling and simulation. Their products include G2.
- geometrical optics — the branch of optics dealing with light as rays, especially in the study of the effects of lenses and mirrors on light beams and of their combination in optical instruments.
- german east africa — a former German territory in E Africa, the area now comprised of continental Tanzania and the independent republics of Rwanda and Burundi.
- gestalt psychology — (sometimes lowercase) the theory or doctrine that physiological or psychological phenomena do not occur through the summation of individual elements, as reflexes or sensations, but through gestalts functioning separately or interrelatedly.
- get one's end away — to have sexual intercourse
- get one's own back — of, relating to, or belonging to oneself or itself (usually used after a possessive to emphasize the idea of ownership, interest, or relation conveyed by the possessive): He spent only his own money.
- get someone's goat — to cause annoyance to someone
- gettysburg address — the notable short speech made by President Lincoln on November 19, 1863, at the dedication of the national cemetery at Gettysburg, Pa.