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17-letter words containing p, r, o, s, c, e

  • optical isomerism — stereoisomerism in which the isomers are identical in molecular weight and most chemical and physical properties but differ in their effect on the rotation of polarized light.
  • organ-pipe cactus — a treelike or columnar cactus, Lemaireocereus marginatus, of Mexico, having a central, erect spine surrounded by spreading spines in clusters of five to eight, and funnel-shaped, brownish-purple flowers.
  • origin of species — (On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life) a treatise (1859) by Charles Darwin setting forth his theory of evolution.
  • over-compensation — a pronounced striving to neutralize and conceal a strong but unacceptable character trait by substituting for it an opposite trait.
  • pacific northwest — the region of North America lying north of the Columbia River and west of the Rockies
  • pair of compasses — compass (def 7)
  • paleobiochemistry — the study of biochemical processes that occurred in fossil life forms.
  • paleoconservative — a person advocating an older, traditional type of conservatism, especially in politics.
  • paradoxical sleep — REM sleep.
  • pecorino (cheese) — an Italian cheese made of sheep's milk; specif., such a cheese that is dry, sharp, and very hard
  • percussion bullet — a bullet that is exploded by percussion
  • performance bonus — a monetary bonus paid to staff who have performed well in their job
  • performance drugs — the drugs that are taken illegally by athletes to enhance their sporting performance
  • periodic sentence — a sentence that, by leaving the completion of its main clause to the end, produces an effect of suspense, as in Unable to join the others at the dance because of my sprained ankle, I went to a movie.
  • pernicious anemia — Pernicious anemia is a very severe blood disease.
  • personal computer — a compact computer that uses a microprocessor and is designed for individual use, as by a person in an office or at home or school, for such applications as word processing, data management, financial analysis, or computer games. Abbreviation: PC.
  • personal distance — personal space.
  • personality clash — friction between two people who have different personalities or points of view
  • personnel carrier — a vehicle used for transporting troops
  • personnel officer — a worker responsible for recruiting employees and dealing with matters relating to them
  • perspicaciousness — having keen mental perception and understanding; discerning: to exhibit perspicacious judgment.
  • peterloo massacre — an incident at St Peter's Fields, Manchester, in 1819 in which a radical meeting was broken up by a cavalry charge, resulting in about 500 injuries and 11 deaths
  • petrarchan sonnet — a sonnet form popularized by Petrarch, consisting of an octave with the rhyme scheme abbaabba and of a sestet with one of several rhyme schemes, as cdecde or cdcdcd.
  • phototherapeutics — the branch of therapeutics that deals with the curative use of light rays.
  • pincushion flower — scabious2 (def 1).
  • point of presence — (PoP) A site where there exists a collection of telecommunications equipment, usually modems, digital leased lines and multi-protocol routers. An Internet access provider may operate several PoPs distributed throughout their area of operation to increase the chance that their subscribers will be able to reach one with a local telephone call. The alternative is for them to use virtual PoPs (virtual points of presence) via some third party.
  • point of purchase — designating or in use at a retail outlet where an item can be purchased; point-of-sale: point-of-purchase displays to entice the buyer.
  • point reyes lilac — a prostrate shrub, Ceanothus gloriosus, of southern California, having leathery, roundish leaves and purplish or deep-blue flowers.
  • point-of-purchase — designating or in use at a retail outlet where an item can be purchased; point-of-sale: point-of-purchase displays to entice the buyer.
  • polar coordinates — Usually, polar coordinates. one of two coordinates used to locate a point in a plane by the length of its radius vector and the angle this vector makes with the polar axis (polar angle)
  • polystyrene chips — small pieces of polystyrene used for insulating or packing
  • positive electron — positron.
  • post-resurrection — the act of rising from the dead.
  • postbaccalaureate — bachelor's degree.
  • prairie provinces — the Canadian provinces of Manitoba, Saskatchewan, and Alberta, which lie in the N Great Plains region of North America: the chief wheat and petroleum producing area of Canada
  • pre-modifications — an act or instance of modifying.
  • precision bombing — aerial bombing in which bombs are dropped, as accurately as possible, on a specific, usually small, target.
  • precision casting — investment casting.
  • prefect apostolic — the administrator, usually below the rank of bishop, in charge of a prefecture apostolic.
  • prescription drug — medication available only on doctor's instruction
  • presentation copy — a copy of a book given by the publisher or author
  • presiding officer — the person who presides over the Scottish Parliament or Welsh Assembly
  • press association — an organization formed for the purpose of gathering news for transmittal to its members. Compare news agency.
  • primary processes — the generally unorganized mental activity characteristic of the unconscious and occurring in dreams, fantasies, and related processes.
  • production system — (programming)   A production system consists of a collection of productions (rules), a working memory of facts and an algorithm, known as forward chaining, for producing new facts from old. A rule becomes eligible to "fire" when its conditions match some set of elements currently in working memory. A conflict resolution strategy determines which of several eligible rules (the conflict set) fires next. A condition is a list of symbols which represent constants, which must be matched exactly; variables which bind to the thing they match and "<> symbol" which matches a field not equal to symbol. Example production systems are OPS5, CLIPS, flex.
  • production values — the quality of a media production (such as a film) in regards to elements such as colours, quality, style, etc
  • project assurance — The process of specifying the support system: techniques, internal standards, measurements, tools, and training for a project; counselling the project team in the application of these elements and monitoring the adherence to the standards.
  • proof of purchase — a document, such as a receipt, etc, that proves that you have purchased or bought something
  • proof-of-purchase — a sales slip, label, box top, or other item associated with a product that is presentable as evidence of actual purchase, as for claiming a refund or rebate.
  • prostatic utricle — a small pouch near the prostate gland that opens into the urethra.
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