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19-letter words containing r, a, d, u

  • least recently used — (operating systems) (LRU) A rule used in a paging system which selects a page to be paged out if it has been used (read or written) less recently than any other page. The same rule may also be used in a cache to select which cache entry to flush. This rule is based on temporal locality - the observation that, in general, the page (or cache entry) which has not been accessed for longest is least likely to be accessed in the near future.
  • longitudinal parity — (storage, communications)   An extra byte (or word) appended to a block of data in order to reveal corruption of the data. Bit n of this byte indicates whether there was an even or odd number of "1" bits in bit position n of the bytes in the block. The parity byte is computed by XORing the data bytes in the block. Longitudinal parity allows single bit errors to be detected.
  • lucia di lammermoor — an opera (1835) by Gaetano Donizetti, based on Sir Walter Scott's novel The Bride of Lammermoor.
  • magnesium hydroxide — a white, crystalline, slightly water-soluble powder, Mg(OH) 2 , used chiefly in medicine as an antacid and as a laxative.
  • manchester autocode — (language, history)   The predecessor of Mercury Autocode.
  • mary mcleod bethune — Mary McLeod [muh-kloud] /məˈklaʊd/ (Show IPA), 1875–1955, U.S. educator and civil-rights leader.
  • master of foxhounds — the person responsible for the conduct of a fox hunt and to whom all members of the hunt and its staff are responsible. Abbreviation: M.F.H.
  • maturation division — a stage in meiosis during which the chromosomal number of the reproductive cell is reduced to one chromosome from each original chromosome pair.
  • means of production — resources: equipment, workers
  • midnight regulation — a rule or directive approved by the federal government near the end of a president’s term of office
  • mordvinian republic — a constituent republic of W central Russia, in the middle Volga basin. Capital: Saransk. Pop: 888 700 (2002). Area: 26 200 sq km (10 110 sq miles)
  • mother-of-thousands — strawberry geranium.
  • mount desert island — an island off the coast of E central Maine: summer resort; forms part of Acadia National Park. 14 miles (23 km) long; 8 miles (13 km) wide.
  • mouse-ear chickweed — any of various similar and related plants of the genus Cerastium
  • mucopolysaccharides — Plural form of mucopolysaccharide.
  • muhammadan calendar — Muslim calendar.
  • mulheim an der ruhr — a city in North Rhine-Westphalia, W Germany, near Essen.
  • munchausen syndrome — a factitious disorder in which otherwise healthy individuals seek to hospitalize themselves with feigned or self-induced pathology in order to receive surgical or other medical treatment.
  • neighbourhood watch — a scheme under which members of a community agree together to take responsibility for keeping an eye on each other's property, as a way of preventing crime
  • neuropsychodynamics — The theoretical synthesis of neuroscience and psychodynamics.
  • nonproprietary drug — A nonproprietary drug is a generic drug that is essentially similar to a drug with a brand name.
  • normal distribution — a theoretical frequency distribution represented by a normal curve.
  • noughts and crosses — tick-tack-toe (def 1).
  • noughts-and-crosses — tick-tack-toe (def 1).
  • nuclear disarmament — the gradual reduction and eventual elimination of all nuclear weapons in the world
  • oak-leaved geranium — a geranium, Pelargonium quercifolium, of southern Africa, having oaklike leaves with purple veins and sparse clusters of purple flowers with darker markings.
  • occupational hazard — a danger or hazard to workers that is inherent in a particular occupation: Silicosis is an occupational hazard of miners.
  • old church slavonic — the oldest attested Slavic language, an ecclesiastical language written first by Cyril and Methodius in a Bible translation of the 9th century and continued in use for about two centuries. It represents the South Slavic, Bulgarian dialect of 9th-century Salonika with considerable addition of other South and West Slavic elements. Abbreviation: OCS.
  • olive-backed thrush — Swainson's thrush.
  • optical 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)
  • ordnance survey map — An Ordnance Survey map is a detailed map produced by the British or Irish government map-making organization.
  • orthopaedic surgeon — a surgeon specializing in the branch of surgery concerned with disorders of the spine and joints and the repair of deformities of these parts
  • orthopaedic surgery — surgery concerned with disorders of the spine and joints and the repair of deformities of these parts
  • out of the ordinary — of no special quality or interest; commonplace; unexceptional: One novel is brilliant, the other is decidedly ordinary; an ordinary person.
  • oxidation-reduction — a chemical reaction between two substances in which one substance is oxidized and the other reduced.
  • parliament building — structure housing legislative offices
  • pecuniary advantage — financial advantage that is dishonestly obtained by deception and that constitutes a criminal offence
  • peroxysulfuric acid — persulfuric acid (def 1).
  • perpetual adoration — uninterrupted adoration of the Blessed Sacrament.
  • perpetual debenture — a bond or debenture that can either never be redeemed or cannot be redeemed on demand
  • police headquarters — building where police are stationed
  • potassium hydroxide — a white, deliquescent, water-soluble solid, KOH, usually in the form of lumps, sticks, or pellets, that upon solution in water generates heat: used chiefly in the manufacture of soap, as a laboratory reagent, and as a caustic.
  • preproduction trial — a trial to test a prototype of a product before the product goes into full-scale production
  • pride and prejudice — a novel (1813) by Jane Austen (written 1796–97).
  • procedural language — (language)   Any programming language in which the programmer specifies an explicit sequences of steps to follow to produce a result (an algorithm). The term should not be confused with "imperative language" - a language that specifies explicit manipulation of state. An example (non-imperative) procedural language is LOGO, which specifies sequences of steps to perform but does not have an internal state. Other procedural languages include Basic, Pascal, C, and Modula-2. Both procedural and imperative languages are in contrast to declarative languages, in which the programmer specifies neither explicit steps nor explicit state manipulation.
  • production platform — offshore power station
  • profitability study — a study of how much profit a company, organization, etc, makes or how profitable it is
  • progressive judaism — Reform Judaism.
  • proto-indo-european — the unattested prehistoric parent language of the Indo-European languages; Indo-European.
  • pseudo-aristocratic — of or relating to government by an aristocracy.
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