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17-letter words containing r, e, c, t, a, n

  • general secretary — the chief administrator of an organization
  • general semantics — a philosophical approach to language, developed by Alfred Korzybski, exploring the relationship between the form of language and its use and attempting to improve the capacity to express ideas.
  • genetic algorithm — (GA) An evolutionary algorithm which generates each individual from some encoded form known as a "chromosome" or "genome". Chromosomes are combined or mutated to breed new individuals. "Crossover", the kind of recombination of chromosomes found in sexual reproduction in nature, is often also used in GAs. Here, an offspring's chromosome is created by joining segments choosen alternately from each of two parents' chromosomes which are of fixed length. GAs are useful for multidimensional optimisation problems in which the chromosome can encode the values for the different variables being optimised.
  • geomagnetic storm — magnetic storm.
  • gigaelectron volt — one billion electron-volts. Abbreviation: GeV, Gev.
  • giscard d'estaing — Valéry [va-ley-ree] /va leɪˈri/ (Show IPA), born 1926, French political leader: president 1974–81.
  • glove compartment — a compartment in the dashboard of an automobile for storing small items.
  • government action — intervention by a government, esp to influence financial markets
  • grand climacteric — Physiology. a period of decrease of reproductive capacity in men and women, culminating, in women, in the menopause.
  • grande chartreuse — the Carthusian monastery at Grenoble, France: the chief monastery of the Carthusians until 1903.
  • grandfather clock — a pendulum floor clock having a case as tall as or taller than a person; tall-case clock; long-case clock.
  • grandmother clock — a pendulum clock similar to a grandfather's clock but shorter.
  • greater celandine — celandine (def 1).
  • greenland current — the ocean current flowing clockwise around S Greenland.
  • grignard reaction — the reaction of a Grignard reagent with any of the numerous types of compounds with which it can combine, as alcohols, acids, aldehydes, ketones, or esters: used chiefly in organic synthesis.
  • haematocrystallin — Alternative form of hematocrystallin.
  • hairline fracture — a very fine crack in a bone
  • handicap register — a list of the disabled people in its area that a local authority had a duty to compile under the Chronically Sick and Disabled Persons Act 1970
  • harmonic interval — an intervening period of time: an interval of 50 years.
  • helicopter parent — a style of child rearing in which an overprotective mother or father discourages a child's independence by being too involved in the child's life: In typical helicopter parenting, a mother or father swoops in at any sign of challenge or discomfort.
  • hemoconcentration — an increase in the concentration of cellular elements in the blood, resulting from loss of plasma.
  • henry cabot lodge — Henry Cabot, 1850–1924, U.S. public servant and author: senator 1893–1924.
  • high-carbon steel — steel containing between 0.5 and 1.5 per cent carbon
  • histamine blocker — any of various substances that act at a specific receptor site to block certain actions of histamine.
  • homeland security — national defence
  • horatio kitchener — Horatio Herbert (1st Earl Kitchener of Khartoum and of Broome) 1850–1916, English field marshal and statesman.
  • housekeeping cart — A housekeeping cart is a large metal basket on wheels which is used by a cleaner in a hotel to move clean bed linen, towels, and cleaning equipment.
  • hyaline cartilage — the typical, translucent form of cartilage, containing little fibrous tissue.
  • hyperbolic secant — a hyperbolic function that is the reciprocal of cosh; sech
  • hyperchlorination — Chemistry. to combine or treat with chlorine. to introduce chlorine atoms into an organic compound by an addition or substitution reaction.
  • hyperintellectual — appealing to or engaging the intellect: intellectual pursuits.
  • iambic pentameter — a verse line consisting of five metrical iambs
  • icositetrahedrons — Plural form of icositetrahedron.
  • ignoratio elenchi — the fallacy of offering proof irrelevant to the proposition in question.
  • image recognition — (graphics, artificial intelligence)   The identification of objects in an image. This process would probably start with image processing techniques such as noise removal, followed by (low-level) feature extraction to locate lines, regions and possibly areas with certain textures. The clever bit is to interpret collections of these shapes as single objects, e.g. cars on a road, boxes on a conveyor belt or cancerous cells on a microscope slide. One reason this is an AI problem is that an object can appear very different when viewed from different angles or under different lighting. Another problem is deciding what features belong to what object and which are background or shadows etc. The human visual system performs these tasks mostly unconsciously but a computer requires skillful programming and lots of processing power to approach human performance.
  • immunotherapeutic — (immunology, medicine) Of a pharmaceutical, acting on the immune system to treat disease; used in immunotherapy.
  • impersonification — (archaic) the act of impersonating; impersonation.
  • impracticableness — The state of being impracticable; impracticability.
  • improper fraction — a fraction having the numerator greater than the denominator.
  • in the background — behind the focus of attention
  • inconsiderateness — without due regard for the rights or feelings of others: It was inconsiderate of him to keep us waiting.
  • incremental value — increased value measured on an index or scale
  • incubation period — the period between infection and the appearance of signs of a disease.
  • indecipherability — Quality of being indecipherable.
  • indian rope-trick — the supposed Indian feat of climbing an unsupported rope
  • indicator species — See at indicator (def 6).
  • indirect taxation — duty paid on goods or services
  • induction furnace — a type of electric furnace used for melting a charge of scrap by the heat produced by its own electrical resistance.
  • inertial guidance — a guidance system for an aerospace vehicle, in which self-contained devices determine the vehicle's course on the basis of the directions and magnitudes of the accelerations it undergoes in flight.
  • insectivorous bat — any bat of the suborder Microchiroptera, typically having large ears and feeding on insects. The group includes common bats (Myotis species), vampire bats, etc
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