20-letter words containing d, e, c, r, a
- permonosulfuric acid — persulfuric acid (def 1).
- peroxysulphuric acid — a white hygroscopic crystalline unstable oxidizing acid. Formula: H2SO5
- perpendicular gothic — the style of Gothic architecture in England during the 14th and 15th centuries, characterized by tracery having vertical lines, a four-centred arch, and fan vaulting
- phosphoric anhydride — phosphorus pentoxide.
- physical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
- pickwickian syndrome — an abnormality characterized by extreme obesity accompanied by sleepiness, hypoventilation, and polycythemia.
- pico della mirandola — Count Giovanni [jaw-vahn-nee] /dʒɔˈvɑn ni/ (Show IPA), 1463–94, Italian humanist and writer.
- polaroid land camera — any of several types of camera yielding a finished print by means of a special developing and processing technique that occurs inside the camera and takes only a few seconds to complete
- potassium dichromate — an orange-red crystalline soluble solid substance that is a good oxidizing agent and is used in making chrome pigments and as a bleaching agent. Formula: K2Cr2O7
- potential difference — voltage
- pound cost averaging — a method of accumulating capital by investing a fixed sum in a particular security at regular intervals, in order to achieve an average purchase price below the arithmetic average of the market prices on the purchase dates
- powhatan confederacy — a network of Algonquian-speaking Indian settlements in Virginia that was ruled by Powhatan.
- poza rica de hidalgo — a city in N Veracruz, in E Mexico.
- predicate nominative — (in Latin, Greek, and certain other languages) a predicate noun or adjective in the nominative case.
- price discrimination — the practice of offering identical goods to different buyers at different prices, when the goods cost the same.
- price-dividend ratio — the ratio of the price of a share on a stock exchange to the dividends per share paid in the previous year, used as a measure of a company's potential as an investment
- prima facie evidence — evidence sufficient to establish a fact or to raise a presumption of fact unless rebutted.
- prima-facie evidence — evidence that is sufficient to establish a fact or to raise a presumption of the truth of a fact unless controverted
- prince edward island — an island in the Gulf of St. Lawrence, forming a province of Canada: 2184 sq. mi. (5655 sq. km). Capital: Charlottetown.
- prince william sound — a sound in the Gulf of Alaska, on the S coast of Alaska: S end of Trans-Alaska oil pipeline at port of Valdez.
- procedural agreement — regulations agreed between the parties to collective bargaining, defining the bargaining units, bargaining scope, procedures for collective bargaining, and the facilities to be provided to trade union representatives
- production agreement — a contract concerning the production or manufacture of something
- 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
- 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.
- 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