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17-letter words containing r, o, s, a, l

  • nuclear isomerism — isomerism (def 2).
  • nuclear threshold — the point in war at which a combatant brings nuclear weapons into use
  • nuclear-isomerism — Chemistry. the relation of two or more compounds, radicals, or ions that are composed of the same kinds and numbers of atoms but differ from each other in structural arrangement (structural isomerism) as CH 3 OCH 3 and CH 3 CH 2 OH, or in the arrangement of their atoms in space and therefore in one or more properties. Compare optical isomerism, stereoisomerism.
  • old age pensioner — An old age pensioner is a person who is old enough to receive an pension from their employer or the government.
  • old red sandstone — a thick sequence of sedimentary rock (generally, but not always, red) deposited in Britain and NW Europe during the Devonian period
  • old south arabian — a group of four closely related Semitic languages, having a writing system and used from about the eighth to the fifth centuries b.c. in the southern part of Arabia.
  • old spanish trail — an overland route from Santa Fe, N. Mex., to Los Angeles, Calif., first marked out in 1776 by Spanish explorers and missionaries.
  • omphalomesenteric — (anatomy) Of or pertaining to the umbilicus and mesentery.
  • operation sealion — the codename for Hitler's proposed invasion (1940) of Great Britain
  • opportunistically — adhering to a policy of opportunism; practicing opportunism.
  • optical astronomy — the branch of observational astronomy using telescopes to observe or photograph celestial objects in visible light.
  • 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.
  • osculating circle — circle of curvature.
  • otolaryngologists — Plural form of otolaryngologist.
  • out of all reason — unreasonable
  • overreach oneself — to fail because of trying to do more than one can
  • oystershell scale — a scale insect, Lepidosaphes ulmi, having a scale shaped like the shell of an oyster, which infests various deciduous trees and shrubs.
  • 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.
  • parker house roll — a soft dinner roll made by folding a flat disk of dough in half.
  • parts per million — the number of units (of a substance) present in a million units of another substance
  • pastoral symphony — the Symphony No. 6 in F major (1807–08) by Ludwig van Beethoven.
  • pastoral theology — the branch of theology dealing with the responsibilities of members of the clergy to the people under their care.
  • patriarchal cross — a Latin cross having a shorter crosspiece above the customary one.
  • 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.
  • peripheral vision — all that is visible to the eye outside the central area of focus; side vision.
  • 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.
  • personal equation — the tendency to personal bias that accounts for variation in interpretation or approach and for which allowance must be made.
  • personal property — an estate or property consisting of movable articles both corporeal, as furniture or jewelry, or incorporeal, as stocks or bonds (distinguished from real property).
  • personality clash — friction between two people who have different personalities or points of view
  • personnel carrier — a vehicle used for transporting troops
  • personnel manager — head of Human Resources department
  • 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
  • pillion passenger — a person who travels in a seat or place behind the rider of a motorcycle, scooter, horse, etc
  • plains of abraham — a high plain adjoining the city of Quebec, Canada: battlefield where the English under Wolfe defeated the French under Montcalm in 1759.
  • plateau's problem — the problem in the calculus of variations of finding the surface with the least area bounded by a given closed curve in space.
  • point reyes lilac — a prostrate shrub, Ceanothus gloriosus, of southern California, having leathery, roundish leaves and purplish or deep-blue flowers.
  • 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)
  • positive polarity — the grammatical characteristic of a word or phrase, such as delicious or rather, that may normally only be used in a semantically or syntactically positive or affirmative context
  • post-and-rail tea — (in the 19th century) a coarse tea in which floating particles resembled a post-and-rail fence
  • postal stationery — an envelope, postal card, wrapper, or aérogramme, with the stamp printed directly on the paper.
  • postbaccalaureate — bachelor's degree.
  • poststructuralism — a variation of structuralism, often seen as a critique, emphasizing plurality of meaning and instability of concepts that structuralism uses to define society, language, etc.
  • posttranslational — Genetics, Biochemistry. occurring after the synthesis of a polypeptide chain.
  • postural drainage — a therapy for clearing congested lungs by placing the patient in a position for drainage by gravity, often accompanied by percussion with hollowed hands.
  • poulter's measure — a metrical pattern using couplets having the first line in iambic hexameter, or 12 syllables, and the second in iambic heptameter, or 14 syllables.
  • prefect apostolic — the administrator, usually below the rank of bishop, in charge of a prefecture apostolic.
  • preferential shop — a shop in which union members are preferred, usually by agreement of an employer with a union.
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