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15-letter words containing o, d, p, r, i

  • pacific madrone — any of several evergreen trees belonging to the genus Arbutus, of the heath family, especially A. menziesii (Pacific madrone) of western North America, having red, flaky bark and bearing edible reddish berries.
  • paedophile ring — a group of people who take part in illegal sexual activity involving children
  • pair production — Physics. the simultaneous creation of a particle and its antiparticle by a nucleus or particle in an excited state, as when a photon is absorbed.
  • palindromically — a word, line, verse, number, sentence, etc., reading the same backward as forward, as Madam, I'm Adam or Poor Dan is in a droop.
  • panzer division — an armored division of the German army, especially in World War II, consisting chiefly of tanks and organized for making rapid attacks.
  • paradise flower — a prickly vine, Solanum wendlandii, of the nightshade family, native to Costa Rica, having branched clusters of showy lilac-blue flowers.
  • parallelopipeda — plural of parallelopipedon
  • partial product — the result obtained when a number is multiplied by one digit of a multiplier
  • paternity order — a court order which declares a child's paternity
  • peak production — the maximum production
  • pectoral girdle — (in vertebrates) a bony or cartilaginous arch supporting the forelimbs.
  • pelargonic acid — a colorless, oily, water-immiscible liquid, C 9 H 1 8 O 2 , occurring as an ester in a volatile oil in species of pelargonium: used chiefly in organic synthesis and in the manufacture of lacquers and plastics.
  • penetration aid — a device or tactic, as the use of chaff or decoys or the maintaining of a low flight level, that helps an aircraft or missile to enter hostile air space.
  • perchloric acid — a colorless, syrupy hygroscopic liquid, HClO 4 , an acid of chlorine containing one more oxygen atom than chloric acid: used chiefly as a reagent in analytical chemistry.
  • period-rotation — a rather large interval of time that is meaningful in the life of a person, in history, etc., because of its particular characteristics: a period of illness; a period of great profitability for a company; a period of social unrest in Germany.
  • periodic motion — any motion that recurs in identical forms at equal intervals of time.
  • periodic system — a system of classification of the elements based on the periodic law.
  • peroxide blonde — You can refer to a woman whose hair has been artificially been made lighter in colour as a peroxide blonde, especially when you want to show that you disapprove of this, or that you think her hair looks unnatural or unattractive.
  • personal friend — a person who is a friend, rather than a colleague or acquaintance
  • phenazopyridine — a substance, C 1 1 H 1 2 ClN 5 , used as a lower urinary tract analgesic.
  • phonocardiogram — the graphic record produced by a phonocardiograph.
  • phosphoric acid — any of three acids, orthophosphoric acid, H 3 PO 4 , metaphosphoric acid, HPO 3 , or pyrophosphoric acid, H 4 P 2 O 7 , derived from phosphorus pentoxide, P 2 O 5 , and various amounts of water.
  • photoproduction — the light-induced production of a species of molecule such as a radical or ion
  • piano accordion — accordion (def 1).
  • piano reduction — a musical score having the parts condensed or simplified in two staves, to render the music playable on the piano by one person.
  • piero di cosimo — Piero di [pee-air-oh di;; Italian pye-raw dee] /piˈɛər oʊ dɪ;; Italian ˈpyɛ rɔ di/ (Show IPA), Piero di Cosimo.
  • polish corridor — a strip of land near the mouth of the Vistula River: formerly separated Germany from East Prussia; given to Poland in the Treaty of Versailles 1919 to provide it with access to the Baltic.
  • polychlorinated — having multiple chlorine atoms
  • post-depression — the act of depressing.
  • post-industrial — of, relating to, or characteristic of an era following industrialization: The economy of the postindustrial society is based on the provision of services rather than on the manufacture of goods.
  • post-production — In film and television, post-production is the work such as editing that takes place after the film has been shot.
  • post-tridentine — of or relating to the city of Trent.
  • postdivestiture — taking place after divestiture
  • posthole digger — a tool or device for digging a posthole.
  • postirradiation — occurring after or due to irradiation
  • powder magazine — a compartment for the storage of ammunition and explosives.
  • prairie-dogging — (in an open-plan office) the practice of looking over the top of one's partition in order to discover the source of or reason for a commotion
  • pre-deprivation — the act of depriving.
  • predicate logic — (logic)   (Or "predicate calculus") An extension of propositional logic with separate symbols for predicates, subjects, and quantifiers. For example, where propositional logic might assign a single symbol P to the proposition "All men are mortal", predicate logic can define the predicate M(x) which asserts that the subject, x, is mortal and bind x with the universal quantifier ("For all"): All x . M(x) Higher-order predicate logic allows predicates to be the subjects of other predicates.
  • premodification — an act or instance of modifying.
  • prestidigitator — sleight of hand; legerdemain.
  • primary product — a product consisting of a natural raw material; an unmanufactured product
  • primo de rivera — Miguel [mee-gel] /miˈgɛl/ (Show IPA), Marqués de Estella [mahr-kes th e es-te-lyah] /mɑrˈkɛs ðɛ ɛsˈtɛ lyɑ/ (Show IPA), (Miguel Prima de Rivera y Orbaneja) 1870–1930, Spanish general and political leader: dictator of Spain 1923–29.
  • primordial soup — the seas and atmosphere as they existed on earth before the existence of life, consisting primarily of an oxygen-free gaseous mixture containing chiefly water, hydrogen, methane, ammonia, and carbon dioxide.
  • private soldier — A private soldier is a soldier of the lowest rank in an army or the marines.
  • privately owned — owned by a private individual or organization, rather than by the state or a public body
  • probation order — an order imposed by a magistrate or judge under which an offender is sentenced to probation rather than imprisonment
  • production line — an arrangement of machines or sequence of operations involved with a single manufacturing operation or production process. Compare assembly line, line1 (def 29).
  • profit and loss — the gain and loss arising from commercial or other transactions, applied especially to an account or statement of account in bookkeeping showing gains and losses in business.
  • program trading — trading on international stock exchanges using a computer program to exploit differences between stock index futures and actual share prices on world equity markets
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