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18-letter words containing p, r, o, y, l

  • plane trigonometry — the branch of trigonometry dealing with plane triangles.
  • polychromatophilic — having an affinity for more than one kind of stain, especially for acid, neutral, and basic stains, as polychromatophilic erythroblasts characteristic of pernicious anemia.
  • polynesian tattler — a sandpiper, H. incanus, native to the Pacific coastal regions
  • polystyrene cement — a purpose-made adhesive for fixing rigid polystyrene
  • polyvinyl chloride — a white, water-insoluble, thermoplastic resin, derived by the polymerization of vinyl chloride: used chiefly for thin coatings, insulation, and pipings.
  • population pyramid — a graph showing the distribution of a population by sex, age, etc.
  • portrait of a lady — a novel (1881) by Henry James.
  • positively charged — having a positive charge
  • post-revolutionary — of, pertaining to, characterized by, or of the nature of a revolution, or a sudden, complete, or marked change: a revolutionary junta.
  • postviral syndrome — debilitating condition occurring as a sequel to viral illness
  • preparatory school — a private or parochial secondary school, especially one boarding its students and providing a college-preparatory education.
  • presentation layer — (networking)   The second highest layer (layer 6) in the OSI seven layer model. Performs functions such as text compression, code or format conversion to try to smooth out differences between hosts. Allows incompatible processes in the application layer to communicate via the session layer. Documents: ITU Rec. X.226 (ISO 8823), ITU Rec. X.216 (ISO 8822).
  • probability theory — the theory of analyzing and making statements concerning the probability of the occurrence of uncertain events. Compare probability (def 4).
  • product life cycle — the four stages (introduction, growth, maturity, and decline) into one of which the sales of a product fall during its market life
  • property developer — person: deals in real estate
  • proprietary colony — any of certain colonies, as Maryland and Pennsylvania, that were granted to an individual or group by the British crown and that were granted full rights of self-government.
  • provably difficult — The set or property of problems for which it can be proven that no polynomial-time algorithm exists, only exponential-time algorithms.
  • psychogalvanometer — a type of galvanometer for detecting and measuring psychogalvanic currents.
  • psychopharmacology — the branch of pharmacology dealing with the psychological effects of drugs.
  • pulmonary embolism — the blockage of a pulmonary artery, often by a blood clot, that stops the flow of blood to the lungs and which can result in death if untreated
  • pyromucic aldehyde — furfural.
  • pyrosulphuric acid — a fuming liquid acid made by adding sulphur trioxide to concentrated sulphuric acid. Formula: H2S2O7
  • reentering polygon — a polygon having one or more reentering angles.
  • reporters' gallery — an area in parliament reserved for journalists and reporters
  • reverse psychology — (in nontechnical use) a method of getting another person to do what one wants by pretending not to want it or to want something else or something more.
  • root canal therapy — endodontics.
  • secondary syphilis — the second stage of syphilis, characterized by eruptions of the skin and mucous membrane.
  • september holidays — a period of time in September when people do not have to go to school, college or work
  • set priority level — (SPL) The way traditional Unix kernels implement mutual exclusion by running code at high interrupt priority levels and thus blocking lower level interrupts.
  • shop till you drop — If you shop till you drop, you do a large amount of shopping.
  • silvery spleenwort — a fern, Diplazium pycnocarpon, of eastern North America, having fronds from 20 to 30 inches (50.8 to 76.2 cm) long on yellowish-green stalks.
  • sling psychrometer — a psychrometer so designed that the wet-bulb thermometer can be ventilated, to expedite evaporation, by whirling in the air.
  • slow-motion replay — a showing again in slow motion of a sequence of action, esp of part of a sporting contest immediately after it happens
  • solitary sandpiper — a North American sandpiper, Tringa solitaria, of inland wetlands, having a brownish-gray, white-spotted back and whitish underparts.
  • solubility product — the maximum number of undissociated ions, of an electrolyte in a saturated solution, capable at a given temperature of remaining in equilibrium with the undissolved phase of the solution.
  • speak for yourself — If you say 'Speak for yourself' when someone has said something, you mean that what they have said is only their opinion or applies only to them.
  • spectrocolorimetry — the quantitative measure of colors by spectrophotometry.
  • spectroheliography — the process of obtaining an image of the sun in light of a particular wavelength, such as calcium or hydrogen, showing the distribution of the element over the surface and in the solar atmosphere, using a spectroheliograph
  • spherical geometry — the branch of geometry that deals with figures on spherical surfaces.
  • spotted flycatcher — a European woodland songbird, Muscicapa striata, with a greyish-brown streaked plumage: family Muscicapidae (Old World flycatchers)
  • super royal octavo — a book size, 63⁄4 by 101⁄4 inches
  • super royal quarto — a book size, 101⁄4 by 131⁄2 inches
  • the-cocktail-party — a play in verse (1950) by T. S. Eliot.
  • three-body problem — the problem of calculating the motions of three bodies in space moving under the influence of only their mutual gravitational attraction.
  • to hold your peace — If you hold or keep your peace, you do not speak, even though there is something you want or ought to say.
  • to play favourites — to display favouritism
  • to spill your guts — if someone spills their guts, they tell you everything about something secret or private
  • traditional policy — a life assurance policy in which the policyholder's premiums are paid into a general fund and his or her investment benefits are calculated according to actuarial formulae
  • western isles pony — a breed of large pony, typically grey, with a dense waterproof coat. The only surviving variety is the Eriskay pony
  • wireless telephony — Now Rare. radiotelephony.
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