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18-letter words containing a, c, t, i, o

  • benzyl thiocyanate — a colorless, crystalline, water-insoluble solid, C 8 H 7 NS, used as an insecticide.
  • bichromate process — any of several methods of photography in which the light-sensitive medium is alkaline bichromate associated with a colloid such as gum, albumen, or gelatin.
  • biodiversification — the process by which the diversity of plants or animals develops or is increased within a particular region or group of organisms.
  • biological control — the control of destructive organisms by the use of other organisms, such as the natural predators of the pests
  • biological parents — the biological mother and father of a child
  • biological therapy — biotherapy
  • biz-core stability — (security)   Internet security products which secure the business core.
  • blanche of castile — ?1188–1252, queen consort (1223–26) of Louis VIII of France, born in Spain. The mother of Louis IX, she acted as regent during his minority (1226–36) and his absence on a crusade (1248–52)
  • blocking capacitor — a capacitor that blocks the passage of direct current but allows alternating current to pass
  • board of directors — A company's board of directors is the group of people elected by its shareholders to manage the company.
  • board of education — a group or agency with responsibility for education
  • board of elections — a bipartisan board appointed usually by local authorities and charged with control of elections and voting procedure.
  • borosilicate glass — any of a range of heat- and chemical-resistant glasses, such as Pyrex, prepared by fusing together boron(III) oxide, silicon dioxide, and, usually, a metal oxide
  • boundary condition — a stated restriction, usually in the form of an equation, that limits the possible solutions to a differential equation.
  • branch instruction — a machine-language or assembly-language instruction that causes the computer to branch to another instruction
  • branch to fishkill — (IBM: from the location of one of the corporation's facilities) Any unexpected jump in a program that produces catastrophic or just plain weird results. See jump off into never-never land, hyperspace.
  • branching fraction — (in branching) the proportion of the disintegrating nuclei that follow a particular branch to the total number of disintegrating nuclides
  • breach of security — an act that violates a country, area, or building's security measures
  • broadcasting house — any of a number of buildings in the UK from which the BBC broadcasts or has broadcast
  • business education — education for general knowledge of business practices.
  • c-reactive protein — a globulin in the blood produced by the liver in response to inflammation
  • cabernet sauvignon — a black grape originally grown in the Bordeaux area of France, and now throughout the wine-producing world
  • cabinet government — parliamentary government.
  • calcium propionate — a white, water-soluble powder, CaC 6 H 10 O 4 , used in bakery products to inhibit the growth of fungi.
  • california current — a cold current originating in the northern part of the Pacific Ocean, flowing SE along the coast of W North America.
  • call into question — to raise a question or doubt about
  • calling convention — (programming)   The arrangement of arguments for a procedure or function call. Different programming languages may require arguments to be pushed onto a stack or entered in registers in left-to-right or right-to left order, and either the caller or the callee can be responsible for removing the arguments. The calling convention also determines if a variable number of arguments is allowed.
  • cambrian mountains — a mountain range in Wales, extending from Carmarthenshire in the S to Denbighshire in the N. Highest peak: Aran Fawddwy, 891 m (2970 ft)
  • can stick/to stick — If you say that someone can stick something, especially a job, or if you tell them where to stick it, you are rudely refusing it or emphasizing that you do not want it or like it.
  • cap of maintenance — a ceremonial cap or hat worn or carried as a symbol of office, rank, etc
  • cape breton island — an island off SE Canada, in NE Nova Scotia, separated from the mainland by the Strait of Canso: its easternmost point is Cape Breton. Pop: 132 298 (2006). Area: 10 280 sq km (3970 sq miles)
  • capital allowances — the money spent by a company on fixed assets which can be taken off the profits of the company before tax is imposed
  • captain james cook — Frederick Albert, 1865–1940, U.S. physician and polar explorer.
  • carisbrooke castle — a castle near Newport on the Isle of Wight: Charles I was held prisoner here from 1647 until his execution in 1649
  • cartilaginous fish — any fish of the class Chondrichthyes, including the sharks, skates, and rays, having a skeleton composed entirely of cartilage
  • cash-for-questions — of, involved in, or relating to a scandal in which some MPs were accused of accepting bribes to ask particular questions in Parliament
  • castration complex — an unconscious fear of having one's genitals removed, as a punishment for wishing to have sex with a parent
  • catalogue raisonne — a descriptive catalogue, esp one covering works of art in an exhibition or collection
  • catalonian jasmine — a shrub, Jasminum grandiflorum, of India, having crimson-tinged, fragrant white flowers, grown as an ornamental and for perfume.
  • categorial grammar — a theory that characterizes syntactic categories in terms of functions between classes of expressions. The basic classes are names (N) and sentences (S). Intransitive verbs are symbols for functions which take a name and yield a sentence (written S/N), adverbs form compound verbs from verbs (for example, run fast) and so are (S/N)/(S/N), etc
  • catherine of siena — Saint. 1347–80, Italian mystic and ascetic; patron saint of the Dominican order. Feast day: April 29
  • cationic detergent — a type of detergent in which the active part of the molecule is a positive ion (cation). Cationic detergents are usually quaternary ammonium salts and often also have bactericidal properties
  • catskill mountains — a mountain range in SE New York State: resort. Highest peak: Slide Mountain, 1261 m (4204 ft)
  • caucasus mountains — a mountain range in SW Russia, running along the N borders of Georgia and Azerbaijan, between the Black Sea and the Caspian Sea: mostly over 2700 m (9000 ft). Highest peak: Mount Elbrus, 5642 m (18 510 ft)
  • ceiling decoration — a plaster moulding for the centre of a ceiling; other decoration, such as coving
  • central projection — a projection of one plane onto a second plane such that a point on the first plane and its image on the second plane lie on a straight line through a fixed point not on either plane.
  • centralized school — a public school formed from the pupils and teachers of a number of discontinued smaller schools, especially in a rural district.
  • cerenkov radiation — radiation emitted when a charged particle travels through a medium at a speed greater than the speed of light through that medium
  • certification mark — a mark that certifies the origin, material, quality, mode of manufacture, accuracy, or other characteristic of a product or service: “UL” is a certification mark for appliances meeting the safety standards of Underwriters Laboratories, Inc.
  • cesarean (section) — a surgical operation for delivering a baby by cutting through the mother's abdominal and uterine walls
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