20-letter words containing c, a, d, e
- prohibited substance — a substance, such as a drug, etc, that is banned or forbidden by law or other authority
- proprietary medicine — a drug or agent manufactured and distributed under a trade name
- pseudo-psychological — of or relating to psychology.
- pseudoparenchymatous — (in certain fungi and red algae) a compact mass of tissue, made up of interwoven hyphae or filaments, that superficially resembles plant tissue.
- pure lambda-calculus — Lambda-calculus with no constants, only functions expressed as lambda abstractions.
- quadrantal corrector — either of two soft-iron spheres attached to each side of a binnacle, intended to correct the compass deviation (quadrantal deviation) resulting from magnetism from ferrous metal in a ship.
- queensland cane toad — a toad, Bufo marinus, introduced into Queensland from Hawaii to control insect pests, becoming a pest itself
- radiation resistance — the resistive component of the impedance of a radio transmitting aerial that arises from the radiation of power
- random access memory — RAM.
- random-access memory — RAM.
- rapid reaction force — a force that can be deployed swiftly to a site of conflict or potential conflict
- read the riot act to — to command to stop doing something regarded as wrong, under threat of punishment
- recommended standard — (standard) (RS) A series of EIA standards including EIA-232.
- red badge of courage — a novel (1895) by Stephen Crane.
- red-carpet treatment — deferential treatment accorded to a person of importance
- red-winged blackbird — a North American blackbird, Agelaius phoeniceus, the male of which is black with scarlet patches, usually bordered with buff or yellow, on the bend of the wing.
- redcar and cleveland — a unitary authority in NE England, in North Yorkshire: formerly (1975–96) part of Cleveland county. Pop: 139 100 (2003 est). Area: 240 sq km (93 sq miles)
- redheaded woodpecker — a North American woodpecker (Melanerpes erythrocephalus), with a bright-red head and neck, black back, and white underparts
- reductio ad absurdum — a reduction to an absurdity; the refutation of a proposition by demonstrating the inevitably absurd conclusion to which it would logically lead.
- redundancy agreement — an agreement over the sum of money given by an employer to an employee who has been made redundant
- republic of maldives — a republic occupying an archipelago of 1087 coral islands in the Indian Ocean, southwest of Sri Lanka: came under British protection in 1887; became independent in 1965 and a republic in 1968; member of the Commonwealth (1982–2016). The economy and infrastructure were severely damaged in the Indian Ocean tsunami of December 2004. Official language: Divehi. Official religion: (Sunni) Muslim. Currency: rufiyaa. Capital: Malé. Pop: 393 988 (2013 est). Area: 298 sq km (115 sq miles)
- ring-necked parakeet — a small brightly coloured long-tailed tropical parrot, Psittacula krameri, often kept as a pet
- ring-necked pheasant — a gallinaceous Asian bird, Phasianus colchicus, having a white band around its neck, introduced into Great Britain, North America, and the Hawaiian Islands.
- rose-colored glasses — a cheerful or optimistic view of things, usually without valid basis: He saw life through rose-colored glasses.
- saint andrew's cross — a low evergreen shrub, Ascyrum hypericoides, native to temperate and subtropical America, having flowers in clusters of three: often cultivated.
- sarcastic fringehead — any fish of the genus Neoclinus, characterized by a row of fleshy processes on the head, as N. blanchardi (sarcastic fringehead) of California coastal waters.
- scavenger's daughter — an instrument of torture that doubled over and squeezed the body so strongly and violently that blood was brought forth from the ears and nose: invented in 16th-century England.
- schizoid personality — sb with identity disorder
- schrodinger equation — the wave equation of nonrelativistic quantum mechanics. Also called Schrödinger wave equation. Compare wave equation (def 2).
- schwarzschild sphere — the sphere which surrounds a non-rotating uncharged black hole, from within which no information can escape because of gravitational forces
- scream bloody murder — Law. the killing of another human being under conditions specifically covered in law. In the U.S., special statutory definitions include murder committed with malice aforethought, characterized by deliberation or premeditation or occurring during the commission of another serious crime, as robbery or arson (first-degree murder) and murder by intent but without deliberation or premeditation (second-degree murder)
- season ticket holder — a person who has a season ticket
- second earl of essex — 2nd Earl of, Devereux, Robert.
- second international — an international association formed in 1889 in Paris, uniting socialistic groups or parties of various countries and holding international congresses from time to time: in 1923 it joined with the Vienna International to form the Labor and Socialist International. Compare international (def 6).
- second law of motion — any of three laws of classical mechanics, either the law that a body remains at rest or in motion with a constant velocity unless an external force acts on the body (first law of motion) the law that the sum of the forces acting on a body is equal to the product of the mass of the body and the acceleration produced by the forces, with motion in the direction of the resultant of the forces (second law of motion) or the law that for every force acting on a body, the body exerts a force having equal magnitude and the opposite direction along the same line of action as the original force (third law of motion or law of action and reaction)
- second-class citizen — a citizen, especially a member of a minority group, who is denied the social, political, and economic benefits of citizenship.
- second-hand bookshop — a shop selling second-hand books
- secure accommodation — an institution where young offenders are kept in custody
- sellers screw thread — a thread form in a system of standard sizes proposed by Sellers in 1884 and later accepted as standard in the USA, having a 60° flank angle with a flat top and foot
- send someone packing — to dismiss or get rid of (someone) peremptorily
- serious fraud office — a UK government office responsible for investigating and prosecuting serious fraud cases
- short back and sides — If a man has a short back and sides, his hair is cut very short at the back and sides with slightly thicker, longer hair on the top of the head.
- silicon tetrahydride — silane (def 1).
- skull and crossbones — a representation of a front view of a human skull above two crossed bones, originally used on pirates' flags and now used as a warning sign, as in designating substances as poisons.
- social security card — a card that contains details of a person's social security number
- societal development — the formation and transformation of social life, customs, institutions, etc.
- sodium fluoroacetate — a white, amorphous, water-soluble, poisonous powder, C 2 H 2 FO 2 Na, used as a rodenticide.
- specific conductance — conductivity (def 2).
- specific-conductance — conductivity (def 2).
- spherical coordinate — Usually, spherical coordinates. any of three coordinates used to locate a point in space by the length of its radius vector and the angles this vector makes with two perpendicular polar planes.