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17-letter words containing p, e, r, i, o, n

  • nitrogen peroxide — the equilibrium mixture of nitrogen dioxide and dinitrogen tetroxide
  • non-comprehension — the act or process of comprehending.
  • non-corresponding — identical in all essentials or respects: corresponding fingerprints.
  • non-proliferation — Non-proliferation is the limiting of the production and spread of something such as nuclear or chemical weapons.
  • non-reciprocating — to give, feel, etc., in return.
  • non-stereotypical — a process, now often replaced by more advanced methods, for making metal printing plates by taking a mold of composed type or the like in papier-mâché or other material and then taking from this mold a cast in type metal.
  • non-thermoplastic — soft and pliable when heated, as some plastics, without any change of the inherent properties.
  • nonimpact printer — a printer that creates images without mechanically impacting the page, as an ink-jet or laser printer.
  • nonproductiveness — The quality of being nonproductive.
  • nonrepresentative — a person or thing that represents another or others.
  • noun pre-modifier — a noun that occurs before and modifies another noun, as toy in toy store or tour in tour group.
  • oceanographically — In terms of oceanography.
  • oil of turpentine — a colorless, flammable, volatile essential oil having a penetrating odor and a pungent, bitter taste, obtained from turpentine oleoresin by distillation: used in paints and varnishes, and in medicine as a carminative, vermifuge, expectorant, rubefacient, and, formerly, as a diuretic.
  • old age pensioner — An old age pensioner is a person who is old enough to receive an pension from their employer or the government.
  • omphalomesenteric — (anatomy) Of or pertaining to the umbilicus and mesentery.
  • on speaking terms — the act, utterance, or discourse of a person who speaks.
  • on-street parking — parking (of a car, vehicle, etc) that is or is allowed to be done on a street
  • one-parent family — A one-parent family is a family that consists of one parent and his or her children living together.
  • one-time password — (security)   (OTP) A security system that requires a new password every time a user authenticates themselves, thus protecting against an intruder replaying an intercepted password. OTP generates passwords using either the MD4 or MD5 hashing algorithms. The equivalent term "S/Key", developed by Bellcore, is a trademark of Telcordia Technologies, so the name OTP is used increasingly. See RFC 1760 - "The S/KEY One-Time Password System" and RFC 1938 - "A One-Time Password System".
  • opening arguments — the statements or arguments provided by lawyers at the beginning of a trial
  • operating theatre — An operating theatre is a special room in a hospital where surgeons carry out medical operations.
  • operation sealion — the codename for Hitler's proposed invasion (1940) of Great Britain
  • operations centre — a centre where activities of a business, organization, etc, are administrated and take place
  • opisthobranchiate — (zoology) Of or pertaining to the Opisthobranchiata.
  • optical carrier n — (networking)   (OC-n) A SONET rate of n times 51.84 megabits per second.
  • 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.
  • ortho-nitrophenol — any compound derived from phenol by the replacement of one or more of its ring hydrogen atoms by the nitro group.
  • over-appreciation — gratitude; thankful recognition: They showed their appreciation by giving him a gold watch.
  • 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
  • palace revolution — a challenge to or overthrow of a sovereign or other leader by members of the ruling family or group.
  • paleoconservative — a person advocating an older, traditional type of conservatism, especially in politics.
  • pan potentiometer — a control on a stereo sound mixing desk by means of which the relative levels in right- and left-hand channels can be adjusted and hence the apparent position of the recorded or broadcast sound source within the stereo panorama can be controlled
  • parts per million — the number of units (of a substance) present in a million units of another substance
  • passenger station — a station used by passengers
  • pecorino (cheese) — an Italian cheese made of sheep's milk; specif., such a cheese that is dry, sharp, and very hard
  • peloponnesian war — a war between Athens and Sparta, 431–404 b.c., that resulted in the transfer of hegemony in Greece from Athens to Sparta.
  • pension provision — the provision of a pension by the state or an employer
  • per capita income — the total income of an area or country divided by the number of people in that area or country
  • per procurationem — by one acting as an agent; by proxy.
  • percussion bullet — a bullet that is exploded by percussion
  • perforation gauge — a marked ruler used to measure the number of perforations per unit length along the borders of a stamp.
  • peridot of ceylon — a honey-colored tourmaline, used as a gem: not a true peridot.
  • period-revolution — 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 function — a function of a real or complex variable that is periodic.
  • 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.
  • peripheral vision — all that is visible to the eye outside the central area of focus; side vision.
  • permutation group — a mathematical group whose elements are permutations and in which the product of two permutations is the same permutation as is obtained by performing them in succession.
  • pernicious anemia — Pernicious anemia is a very severe blood disease.
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