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18-letter words containing on

  • causa sine qua non — an indispensable condition; requisite.
  • ceiling decoration — a plaster moulding for the centre of a ceiling; other decoration, such as coving
  • cellular automaton — (algorithm, parallel)   (CA, plural "- automata") A regular spatial lattice of "cells", each of which can have any one of a finite number of states. The state of all cells in the lattice are updated simultaneously and the state of the entire lattice advances in discrete time steps. The state of each cell in the lattice is updated according to a local rule which may depend on the state of the cell and its neighbors at the previous time step. Each cell in a cellular automaton could be considered to be a finite state machine which takes its neighbours' states as input and outputs its own state. The best known example is J.H. Conway's game of Life.
  • cellular telephone — a mobile phone
  • 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.
  • centum call second — (unit)   (CCS) A unit used (in North America) to quantify the total traffic running in a network. 1 CCS is 100 call-seconds. That means 1 CCS could be 2 calls of 50 seconds duration or 20 calls of 5 seconds duration.
  • 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
  • championship point — a point that would decide the winner of a match that would decide the championship
  • change one's spots — to reform one's character
  • charge conjugation — the mathematical operation of replacing every elementary particle by its antiparticle. Symbol: C.
  • chebyshev equation — Tchebycheff equation.
  • check verification — Check verification is a system that checks national databases of information about individuals to make sure that checks will be honored and fraud is not being committed.
  • chew someone's ear — to reprimand severely
  • chinese revolution — the overthrow of the last Manchu emperor and the establishment of a republic in China (1911–12)
  • chinese watermelon — a tropical Asian vine, Benincasa hispida, of the gourd family, having a brown, hairy stem, large, solitary, yellow flowers, and white, melonlike fruit.
  • chloroacetophenone — a white, crystalline, water-insoluble, poisonous solid, C 8 H 7 ClO, used in solution as a tear gas. Abbreviation: CN.
  • chlorofluorocarbon — Chlorofluorocarbons are the same as CFCs.
  • chlorohydroquinone — a white to light-tan, crystalline, water-soluble solid, C 6 H 3 Cl(OH) 2 , used chiefly in organic synthesis and as a developer in photography.
  • chromatic semitone — the pitch difference between one note and its sharpened or flattened equivalent
  • chronic alcoholism — long-term alcohol addiction
  • chronic bronchitis — persistent respiratory disease
  • chronostratigraphy — The branch of geology concerned with establishing the absolute ages of strata.
  • circumnavigational — Relating to circumnavigation.
  • classified section — the part of a publication that contains classified advertising
  • clean up one's act — to start to behave in a responsible manner
  • closed corporation — a corporation the stock of which is owned by a small number of persons and is rarely traded on the open market
  • closure conversion — (theory)   The transformation of continuation passing style code so that the only free variables of functions are names of other functions. See also Lambda lifting.
  • coast rhododendron — a rhododendron, Rhododendron macrophyllum, of western North America, having large clusters of rose-purple flowers spotted with brown: the state flower of Washington.
  • coastguard station — the headquarters or local offices of a coastguard
  • collagen injection — an injection of collagen into the lip in order to give it a fuller appearance
  • collection charges — the charges levied to cover expenses for the collection of debt
  • collision coverage — Collision coverage is insurance cover for vehicle accidents.
  • collision diameter — the distance between the centers of two colliding molecules when at their closest point of approach.
  • colloidal solution — a mixture having particles of one component, with diameters between 10 −7 and 10 −9 metres, suspended in a continuous phase of another component. The mixture has properties between those of a solution and a fine suspension
  • colonic irrigation — Colonic irrigation is a medical procedure in which a person's colon is washed by injecting water or other fluids into it.
  • combination square — an adjustable device for carpenters, used as a try square, miter square, level, etc.
  • combined operation — a military operation carried out jointly by allied forces
  • combustion chamber — an enclosed space in which combustion takes place, such as the space above the piston in the cylinder head of an internal-combustion engine or the chambers in a gas turbine or rocket engine in which fuel and oxidant burn
  • combustion furnace — a furnace used in the laboratory to carry out elemental analysis of organic compounds
  • come someone's way — to come within someone's scope or range; come to someone
  • commando operation — a major operation for treatment of cancer of the head and neck, involving removal of many facial structures and subsequent surgical reconstruction
  • commendation medal — a U.S. military decoration awarded for meritorious achievement or service
  • common command set — (storage, standard)   (CCS) Additional requirements and features for direct-access SCSI devices. In 1985 when the first SCSI standard was being finalised as an American National Standard, the X3T9.2 Task Group was approached by some manufacturers who wanted changes. Rather than delay the SCSI standard, X3T9.2 formed an ad hoc group to define CCS.
  • common data format — (library)   (CDF) A library and toolkit based on a self-describing data format for scalar and multidimensional data. CDF aims to be platform- and discipline-independent. A scientific data management package (CDF Library) allows developers to manage data and metadata through APIs. CDF has built-in support for data compression (gZip, RLE, Huffman) and files larger than two gigabytes. There are interfaces for C, FORTRAN, Java, Perl, C#, Visual Basic, IDL and MATLAB.
  • common denominator — In mathematics, a common denominator is a number which can be divided exactly by all the denominators in a group of fractions.
  • common user access — (programming)   (CUA) The user interface standard of SAA.
  • common wintergreen — a plant (Pyrola minor) of temperate and arctic regions, having rounded leaves and small pink globose flowers: family Pyrolaceae
  • common-law husband — a man considered to be a woman's husband after the couple have cohabited for several years
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