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18-letter words containing r, o, a, s, t, i

  • crookes radiometer — a type of radiometer consisting of an evacuated glass bulb containing a set of lightweight vanes, each blackened on one side. The vanes are mounted on a vertical axis and revolve when light, or other radiant energy, falls on them
  • crude oil desalter — A crude oil desalter is equipment which removes inorganic salts from crude oil, using chemical or electrostatic separation.
  • crystal microphone — a microphone that uses a piezoelectric crystal to convert sound energy into electrical energy
  • crystal oscillator — a clear, transparent mineral or glass resembling ice.
  • cultural diffusion — act of diffusing; state of being diffused.
  • cultural sociology — the study of the origins and development of societal institutions, norms, and practices.
  • cumbrian mountains — a mountain range in NW England, in Cumbria. Highest peak: Scafell Pike, 977 m (3206 ft)
  • cumulative scoring — a method of scoring in which the score of a partnership is taken as the sum of their scores on all hands played.
  • customer relations — Customer relations are the relationships that a business has with its customers and the way in which it treats them.
  • cytoarchitectonics — Cytoarchitecture.
  • deanthropomorphism — the ridding of philosophy or religion of anthropomorphic beliefs and doctrines.
  • dechristianization — The act of dechristianizing; the systematic removal of Christianity or Christian elements.
  • depository library — a library designated by law to receive without charge all or a selection of the official publications of a government.
  • dia de los muertos — Day of the Dead.
  • diastereoisomerism — (chemistry) Any form of stereoisomerism other than enantiomerism.
  • diatomaceous earth — an unconsolidated form of diatomite
  • digital switchover — the process of changing the method of transmitting television from analogue to digital format
  • dihydrotachysterol — a white, crystalline, water-insoluble sterol, C 28 H 46 O, derived from ergosterol: used chiefly in the treatment of hypoparathyroidism.
  • diphosphoglycerate — an ester of phosphoric acid and glyceric acid that occurs in the blood and that promotes the release of hemoglobin-bound oxygen.
  • diplomatic service — diplomatic corps
  • directional signal — any of four signal lights on the front left, front right, rear left, and rear right of an automotive vehicle that, when actuated by the driver, flash in pairs on the side toward which a turn is to be made.
  • display postscript — An extended form of PostScript permitting its interactive use with bitmap displays.
  • disproportionality — not in proportion; disproportionate.
  • disproportionately — not proportionate; out of proportion, as in size or number.
  • disproportionation — the simultaneous oxidation and reduction of a substance reacting with itself, thereby forming two dissimilar molecules, as 2C 2 H 4 →C 2 H 6 +C 2 H 2 .
  • distribution class — form class
  • distribution ratio — the ratio of concentrations of a solute distributed between two immiscible solvents in contact with each other, as iodine in water and chloroform
  • divine inspiration — insight provided by higher power
  • division algorithm — the theorem that an integer can be written as the sum of the product of two integers, one a given positive integer, added to a positive integer smaller than the given positive integer. Compare Euclidean algorithm.
  • donor insemination — a process which involves using sperm which has been voluntarily given for use in the insemination of another person
  • drainpipe trousers — trousers with very narrow legs
  • driver's education — high-school driving classes
  • dwarf storage unit — (humour)   (DSU) An IBM term for a cupboard.
  • eastern algonquian — a subgroup of the Algonquian language family, comprising the languages spoken aboriginally from Nova Scotia to northeastern North Carolina.
  • eleanor of castile — 1246–90, Spanish wife of Edward I of England. Eleanor Crosses were erected at each place at which her body rested between Nottingham, where she died, and London, where she is buried
  • electoral district — an area that is considered as unit for the purposes of an election
  • electoral register — An electoral register is an official list of all the people who have the right to vote in an election.
  • electrocardiograms — Plural form of electrocardiogram.
  • electrodesiccation — The drying of tissue, and the prevention of bleeding, using a high-frequency electric current.
  • electroretinograms — Plural form of electroretinogram.
  • electrostatic lens — an electron lens consisting of a system of metal electrodes, the electrostatic field of which focuses the charged particles
  • electrostatic unit — any unit that belongs to a system of electrical cgs units in which the electric constant is given the value of unity and is taken as a pure number
  • equinoctial spring — either of the two highest spring tides that occur at the equinoxes
  • eraser stains code — (humour, programming)   Code that has been refactored many times, leaving swaths of legacy code and design; like paper that has been written on and erased so many times that the pencil marks are no longer the problem - the large greasy stain is.
  • 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).
  • evapotranspiration — The process by which water is transferred from the land to the atmosphere by evaporation from the soil and other surfaces and by transpiration from plants.
  • 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.
  • examination script — a script with answers written on it by an examination candidate taking a written examination
  • excess profits tax — a tax on profits exceeding a certain amount
  • false imprisonment — the unlawful restraint of a person from exercising the right to freedom of movement.
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