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

  • pseudo-conservative — disposed to preserve existing conditions, institutions, etc., or to restore traditional ones, and to limit change.
  • pseudo-experimental — pertaining to, derived from, or founded on experiment: an experimental science.
  • pseudo-intransitive — denoting an occurrence of a normally transitive verb in which a direct object is not explicitly stated or forms the subject of the sentence, as in Margaret is cooking or these apples cook well
  • pseudo-professional — following an occupation as a means of livelihood or for gain: a professional builder.
  • pseudohermaphrodite — an individual having internal reproductive organs of one sex and external sexual characteristics resembling those of the other sex or being ambiguous in nature. Compare hermaphrodite (def 1).
  • pseudorandom number — (programming)   One of a sequence of numbers generated by some algorithm so as to have an even distribution over some range of values and minimal correlation between successive values. Pseudorandom numbers are used in simulation and encryption. They are pseudorandom not random because the sequence eventually repeats exactly and is entirely determined by the initial conditions. One of the simplest algorithms is x[i+1] = (a * x[i] + c) mod m but this repeats after at most m numbers and successive numbers are closely related. Better algorithms generally use more previous numbers to calculate the next number.
  • pyrophosphoric acid — a crystalline, water-soluble powder, H 4 P 2 O 7 , formed by the union of one molecule of phosphorus pentoxide with two molecules of water.
  • radiation potential — the potential in volts that must be applied to an atom or molecule to cause it to emit radiation at one of its characteristic frequencies.
  • radiochromatography — chromatography in which radiolabeled substances on the chromatogram are determined quantitatively or qualitatively by measuring their radioactivity.
  • radiopharmaceutical — any of a number of radioactive drugs used diagnostically or therapeutically.
  • ralph waldo emerson — Ralph Waldo [wawl-doh,, wol-] /ˈwɔl doʊ,, ˈwɒl-/ (Show IPA), 1803–82, U.S. essayist and poet.
  • rancho palos verdes — a town in SW California.
  • rapture of the deep — nitrogen narcosis.
  • reactive depression — depression occurring in response to some situational stress, as loss of one's job.
  • reduction potential — (in a galvanic cell) the potential of the electrode at which reduction occurs.
  • refreshable display — braille display
  • relative impediment — a fact or circumstance that disqualifies from lawful marriage persons who are closely related.
  • republic of ireland — John, 1838–1918, U.S. Roman Catholic clergyman and social reformer, born in Ireland: archbishop of St. Paul, Minn., 1888–1918.
  • reserved occupation — in time of war, an occupation from which one will not be called up for military service
  • resplendent quetzal — See under quetzal (def 1).
  • royal correspondent — a journalist who reports on matters relating to royalty
  • saddharma-pundarika — a Mahayana sutra, forming with its references to Amida and the Bodhisattvas the basis for the doctrine that there is something of Buddha in everyone, so that salvation is universally available: a central text of Mahayana Buddhism.
  • saint patrick's day — March 17, observed by the Irish in honor of St. Patrick, the patron saint of Ireland.
  • san bernardino pass — a pass over the Lepontine Alps in SE Switzerland. Highest point: 2062 m (6766 ft)
  • santa rosa de copan — a town in W Honduras: site of extensive Mayan ruins.
  • scale down (or up) — to reduce (or increase), often according to a fixed ratio or proportion
  • sea floor spreading — a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out.
  • sea-floor spreading — a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out.
  • secondary picketing — the picketing by strikers of a place of work that supplies goods to or distributes goods from their employer
  • secondary processes — the conscious mental activity and logical thinking controlled by the ego and influenced by environmental demands.
  • semipalmated plover — a New World plover, Charadrius semipalmatus, having a black ring around the chest and semipalmate feet, inhabiting beaches and salt marshes.
  • sensory deprivation — the experimental or natural reduction of environmental stimuli, as by physical isolation or loss of eyesight, often leading to cognitive, perceptual, or behavioral changes, as disorientation, delusions, or panic.
  • sexual reproduction — reproduction involving the union of gametes.
  • sharp-tailed grouse — a grouse, Pedioecetes phasianellus, of prairies and open forests of western North America, similar in size to the prairie chicken but with a more pointed tail.
  • ship-to-shore radio — a radio that carries communications between land and sea
  • shipping department — a department in a company responsible for arranging, receiving, recording, and sending shipments of goods
  • simple carbohydrate — a carbohydrate, as glucose, that consists of a single monosaccharide unit.
  • spider-hunting wasp — any solitary wasp of the superfamily Pompiloidea, having a slender elongated body: the fast-running female hunts spiders as a food store for her larvae
  • spread oneself thin — to draw, stretch, or open out, especially over a flat surface, as something rolled or folded (often followed by out).
  • stakeholder pension — In Britain, a stakeholder pension is a flexible pension scheme with low charges. Both employees and the state contribute to the scheme, which is optional, and is in addition to the basic state pension.
  • standard atmosphere — an arbitrarily determined vertical distribution of atmospheric pressure, temperature, and density, assumed to have physical constants and conforming to parametric equations, used for calculations in ballistics, the design of pressure altimeters, etc.
  • standing broad jump — a jump for distance from a standing position.
  • stationery cupboard — a cupboard where things like paper, pens and paper clips are kept
  • stratford-upon-avon — town in S Warwickshire, England, on the Avon: birthplace & burial place of Shakespeare: pop. of county district (called Stratford-on-Avon) 106,000
  • sun-and-planet gear — a planetary epicyclic gear train.
  • superannuation fund — a fund used for paying pensions
  • supercritical fluid — A supercritical fluid is a fluid at a temperature and pressure at which there is no difference between liquid and gas.
  • supreme de volaille — suprême (def 2).
  • tall poppy syndrome — a tendency to disparage any person who has achieved great prominence or wealth
  • talleyrand-perigord — Charles Maurice de [sharl moh-rees duh] /ʃarl moʊˈris də/ (Show IPA), Prince de Bénévent [duh bey-ney-vahn] /də beɪ neɪˈvɑ̃/ (Show IPA), 1754–1838, French statesman.
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