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18-letter words containing a, d, r, o, i

  • commando operation — a major operation for treatment of cancer of the head and neck, involving removal of many facial structures and subsequent surgical reconstruction
  • commedia dell'arte — a form of popular comedy developed in Italy during the 16th to 18th centuries, with stock characters such as Punchinello, Harlequin, and Columbine, in situations improvised from a plot outline
  • common denominator — In mathematics, a common denominator is a number which can be divided exactly by all the denominators in a group of fractions.
  • communication cord — a cord or chain in a train which may be pulled by a passenger to stop the train in an emergency
  • comodoro rivadavia — a city in E Argentina.
  • comparative method — a body of procedures and criteria used by linguists to determine whether and how two or more languages are related and to reconstruct forms of their hypothetical parent language.
  • compensation award — an amount of money awarded as compensation in a court case
  • compensation order — (in Britain) the requirement of a court that an offender pay compensation for injury, loss, or damage resulting from an offence, either in preference to or as well as a fine
  • concussion grenade — a grenade designed to inflict damage by the force of its detonation rather than by the fragmentation of its casing.
  • condensation trail — contrail.
  • conductivity water — water that has a conductivity of less than 0.043 × 10–6 S cm–1
  • conjugated protein — a biochemical compound consisting of a sequence of amino acids making up a simple protein to which another nonprotein group (a prosthetic group), such as a carbohydrate or lipid group, is attached
  • conservation grade — relating to food produced using traditional methods where possible, and following strict specifications regarding animal feeds and welfare, the use of chemical fertilizers, wildlife conservation, and land management
  • considered harmful — (programming, humour)   A type of phrase based on the title of Edsger W. Dijkstra's famous note in the March 1968 Communications of the ACM, "Goto Statement Considered Harmful", which fired the first salvo in the structured programming wars. Amusingly, the ACM considered the resulting acrimony sufficiently harmful that it will (by policy) no longer print articles taking so assertive a position against a coding practice. In the ensuing decades, a large number of both serious papers and parodies bore titles of the form "X considered Y". The structured-programming wars eventually blew over with the realisation that both sides were wrong, but use of such titles has remained as a persistent minor in-joke.
  • contact dermatitis — dermatitis caused by direct contact with an irritating substance, as an allergen or chemical
  • continued fraction — a number plus a fraction whose denominator contains a number and a fraction whose denominator contains a number and a fraction, and so on
  • contradistinctions — Plural form of contradistinction.
  • cooling degree-day — a degree-day above the standard temperature of 75°F (24°C), used in estimating the energy requirements for air conditioning and refrigeration.
  • cordillera central — a mountain range in Colombia: part of the Andes. Highest peak, Huila, 18,700 feet (5700 meters).
  • corporate identity — business brand
  • counter-adaptation — the act of adapting.
  • countryside agency — (in England) a government agency that promotes the conservation and enjoyment of the countryside and aims to stimulate employment in rural areas
  • creme de framboise — a liqueur flavored with raspberries.
  • crested dog's-tail — a common wiry perennial grass, Cynosurus cristatus, of meadows and pasture
  • 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
  • cross-disciplinary — linking two or more fields of study
  • crude oil desalter — A crude oil desalter is equipment which removes inorganic salts from crude oil, using chemical or electrostatic separation.
  • crude oil fraction — A crude oil fraction is a component of crude oil, which has its own particular molecular composition, weight, and boiling point.
  • cultural diffusion — act of diffusing; state of being diffused.
  • curvature of field — a monochromatic aberration of a lens or other optical system in which the focal surface is curved, the refracted image of an object oriented perpendicular to the axis of the lens lying on a curved surface rather than in a plane perpendicular to the axis.
  • david lloyd george — David, 1st Earl of Dwyfor [doo-vawr] /ˈdu vɔr/ (Show IPA), 1863–1945, British statesman: prime minister 1916–22.
  • de bruijn notation — (language)   A variation of lambda notation for specifying functions using numbers instead of names to refer to formal parameters. A reference to a formal parameter is a number which gives the number of lambdas (written as \ here) between the reference and the lambda which binds the parameter. E.g. the function \ f . \ x . f x would be written \ . \ . 1 0. The 0 refers to the innermost lambda, the 1 to the next etc. The chief advantage of this notation is that it avoids the possibility of name capture and removes the need for alpha conversion.
  • de-differentiation — a process by which structures or behaviors that were specialized for a specific function lose their specialization and become simplified or generalized.
  • dead as a doornail — completely dead
  • dead-letter office — an office where undeliverable letters were taken for storage
  • deanthropomorphism — the ridding of philosophy or religion of anthropomorphic beliefs and doctrines.
  • decachlorobiphenyl — (organic compound) The fully chlorinated polychlorinated biphenyl containing ten chlorine atoms.
  • dechristianization — The act of dechristianizing; the systematic removal of Christianity or Christian elements.
  • declaration of war — a formal statement made by one country to another that a state of war now exists between them
  • decompartmentalize — to remove excessive compartmentalization from (an organization)
  • demilitarized zone — an area from which military presence or function has been removed
  • democratic deficit — any situation in which there is believed to be a lack of democratic accountability and control over the decision-making process
  • depository library — a library designated by law to receive without charge all or a selection of the official publications of a government.
  • determinate growth — growth of a plant stem that is terminated early by the formation of a bud
  • dia de los muertos — Day of the Dead.
  • diaminofluorescein — (organic compound) A fluorescein into which two amino groups have been substituted.
  • diamondback turtle — any edible North American terrapin of the genus Malaclemys, esp M. terrapin, occurring in brackish and tidal waters and having diamond-shaped markings on the shell: family Emydidae
  • diastereoisomerism — (chemistry) Any form of stereoisomerism other than enantiomerism.
  • diatomaceous earth — an unconsolidated form of diatomite
  • dichloracetic acid — a highly corrosive acid. Formula: C2H2Cl2O2
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