18-letter words containing u, d, o
- butler's sideboard — a sideboard, often with a fall front, having on its top a china cabinet with glazed doors.
- 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.
- chartered surveyor — (in Britain) a surveyor who is registered with the Royal Institution of Chartered Surveyors as having the qualifications, training, and experience to satisfy their professional requirements
- 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.
- chocolate-coloured — dark brown
- chuck-will's-widow — a large North American nightjar, Caprimulgus carolinensis, similar to the whippoorwill
- church of scotland — the established church in Scotland, Calvinist in doctrine and Presbyterian in constitution
- circular dichroism — selective absorption of one of the two possible circular polarizations of light.
- clew down (or up) — to lower (or raise) a sail by means of clew lines
- coast-guard cutter — a cutter used by the U.S. Coast Guard.
- coastguard station — the headquarters or local offices of a coastguard
- coiled tubing unit — A coiled tubing unit is all of the equipment needed to carry out coiled tubing drilling.
- 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
- colossus of rhodes — a giant bronze statue of Apollo built on Rhodes in about 292–280 bc; destroyed by an earthquake in 225 bc; one of the Seven Wonders of the World
- common-law husband — a man considered to be a woman's husband after the couple have cohabited for several years
- communication cord — a cord or chain in a train which may be pulled by a passenger to stop the train in an emergency
- community medicine — medical services for a particular area
- computer-generated — produced by a computer program
- concussion grenade — a grenade designed to inflict damage by the force of its detonation rather than by the fragmentation of its casing.
- 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
- connected subgraph — (mathematics) A connected graph consisting of a subset of the nodes and edges of some other graph.
- consecrated ground — ground that has been made or declared sacred or holy, and is therefore suitable for Christian burial
- 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.
- constitutionalized — Simple past tense and past participle of constitutionalize.
- 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
- costume department — the department in a theatre or television company that is responsible for actors' costumes
- couldn't care less — If you say that you couldn't care less about someone or something, you are emphasizing that you are not interested in them or worried about them. In American English, you can also say that you could care less, with the same meaning.
- counter-adaptation — the act of adapting.
- counter-productive — Something that is counter-productive achieves the opposite result from the one that you want to achieve.
- countryside agency — (in England) a government agency that promotes the conservation and enjoyment of the countryside and aims to stimulate employment in rural areas
- 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.
- cursor dipped in x — (jargon) The metaphorical source of the electronic equivalent of a poisoned-pen letter. Derived from English metaphors of the form "pen dipped in X" (where X = e.g. "acid", "bile", "vitriol"). These map over neatly to this hackish usage (the cursor being what moves, leaving letters behind, when one is composing on-line). "Talk about a nastygram! He must've had his cursor dipped in acid when he wrote that one!"
- 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.
- cushing's syndrome — a medical condition characterized by obesity, hypertension, excessive hair growth, etc., caused by an overactive adrenal gland or large doses of corticosteroids
- custodial sentence — a sentence given by a court that involves a term of imprisonment
- customs and excise — Customs and Excise is a British government department which is responsible for collecting taxes on imported and exported goods. Compare Customs Service.
- cut-and-waste code — (humour, programming) Code that someone found online (e.g. in a blog) and copied and pasted into a product. The result is usually a lot of wasted time trying to track down obscure bugs from code that may have made sense in the original context but not in the new one. Also known as blog-driven development.
- dangerous offender — an offender who is deemed by a court of law to be likely to engage in further violent conduct, and who thus becomes eligible for an indefinite prison sentence
- data communication — electronic transmission of information that has been encoded for storage and processing by computers.
- 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.
- decision procedure — a procedure, as an algorithm, for determining in a finite number of steps the validity of any of a certain class of propositions.
- deep-discount bond — a fixed-interest security that pays little or no interest but is issued at a substantial discount to its redemption value, thus largely substituting capital gain for income
- defense calculator — IBM 701
- deficiency account — an account summarizing the financial condition of an individual or company in danger of bankruptcy.
- deinstitutionalize — to discharge (a patient) as from a mental institution
- departure platform — a raised area at a railway station from which passengers can board trains prior to their departing
- dermot macmurrough — ?1110–71, king of Leinster, who, by enlisting the support of the English to win back his kingdom, was responsible for the English conquest of Ireland