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20-letter words containing a, g, c

  • nonrepeating decimal — a decimal representation of any irrational number, having the property that no sequence of digits is repeated ad infinitum.
  • normal magnification — the magnification produced by a telescope or microscope such that the diameter of the exit pupil of the instrument is equal to the diameter of the pupil of the eye.
  • norwegian forest cat — a breed of long-haired cat with a long bushy tail and a long mane
  • occupation groupings — a system of classifying people according to occupation, based originally on information obtained by government census and subsequently developed by market research. The classifications are used by the advertising industry to identify potential markets. The groups are A, B, C1, C2, D, and E
  • ode on a grecian urn — a poem (1819) by Keats.
  • officer of the guard — an officer, acting under the officer of the day, who is responsible for the instruction, discipline, and performance of duty of the guard in a post, camp, or station. Abbreviation: OG, O.G.
  • omega-3 (fatty acid) — a type of polyunsaturated fatty acid in fish oil, shellfish, soybeans, etc., linked to low cholesterol and low LDL levels
  • omega-minus particle — a baryon with strangeness −3, isotopic spin 0, and negative charge; predicted from the mathematics of the Eightfold Way and subsequently discovered. Symbol: Ω −.
  • ontological argument — an a priori argument for the existence of God, asserting that as existence is a perfection, and as God is conceived of as the most perfect being, it follows that God must exist; originated by Anselm, later used by Duns Scotus, Descartes, and Leibniz.
  • open learning centre — an establishment which provides further education on a flexible part-time basis
  • operant conditioning — conditioning (def 1).
  • operating conditions — Operating conditions are a set of conditions for operating a particular system or process.
  • optical mark reading — the reading of marks by an optical device whereby the information can be stored in machine-readable form
  • orthognathic surgery — the surgical correction of deformities or malpositions of the jaw.
  • oscillating universe — a variant model of the closed universe in which the universe undergoes cycles of expansion and contraction.
  • ovo-lacto vegetarian — a vegetarian who eats eggs and dairy products
  • ovo-lacto-vegetarian — lacto-ovo-vegetarian.
  • oxyacetylene welding — welding using an oxyacetylene burner
  • pan-american highway — a road system proposed in the 1920s linking nations of the Western Hemisphere, extending from Alaska to Santiago, Chile, with some gaps remaining in Panama and Colombia. The section between Nuevo Laredo, Mexico and Panama City is known as the Inter-American Highway Total length about 16,000 miles (25,744 km).
  • paper chromatography — the separation of mixtures into their constituents by preferential adsorption by a solid, as a column of silica (column chromatography) or a strip of filter paper (paper chromatography) or by a gel.
  • peremptory challenge — a formal objection to the service of a juror by a party to a criminal prosecution or a civil action that requires no showing of cause.
  • perpendicular gothic — the style of Gothic architecture in England during the 14th and 15th centuries, characterized by tracery having vertical lines, a four-centred arch, and fan vaulting
  • photogelatin process — collotype (def 1).
  • phthalocyanine green — a pigment used in painting, derived from chlorinated copper phthalocyanine and characterized chiefly by its intense green color and permanence.
  • physical meteorology — the branch of meteorology dealing with the study of optical, electrical, acoustical, and thermodynamic phenomena in the atmosphere, including the physics of clouds and precipitation.
  • physiologic jaundice — a transitory jaundice that affects some infants for the first few days after birth.
  • physiological saline — a salt solution that has the same osmotic pressure as that found in the blood or tissues
  • piezomagnetic effect — the production of a magnetic field by applying a mechanical stress to certain crystals
  • planning application — In Britain, a planning application is a formal request to a local authority for permission to build something new or to add something to an existing building.
  • pledge of allegiance — a solemn oath of allegiance or fidelity to the U.S., beginning, “I pledge allegiance to the flag,” and forming part of many flag-saluting ceremonies in the U.S.
  • pound cost averaging — a method of accumulating capital by investing a fixed sum in a particular security at regular intervals, in order to achieve an average purchase price below the arithmetic average of the market prices on the purchase dates
  • poza rica de hidalgo — a city in N Veracruz, in E Mexico.
  • prescription glasses — corrective spectacles
  • prescriptive grammar — an approach to grammar that is concerned with establishing norms of correct and incorrect usage and formulating rules based on these norms to be followed by users of the language.
  • price-earnings ratio — the current price of a share of common stock divided by earnings per share over a 12-month period, often used in stock evaluation. Abbreviation: p/e.
  • procedural agreement — regulations agreed between the parties to collective bargaining, defining the bargaining units, bargaining scope, procedures for collective bargaining, and the facilities to be provided to trade union representatives
  • production agreement — a contract concerning the production or manufacture of something
  • proportional spacing — a feature of some typewriters and other output devices whereby the space allotted to each character is determined by the width of the character
  • prosecuting attorney — the public officer in a county, district, or other jurisdiction charged with carrying on the prosecution in criminal proceedings.
  • pseudo-psychological — of or relating to psychology.
  • psychological moment — the proper or critical time for achieving a desired result: She found the right psychological moment to make her request.
  • pyroligneous alcohol — methyl alcohol.
  • quantum bogodynamics — /kwon'tm boh"goh-di:-nam"iks/ A theory that characterises the universe in terms of bogon sources (such as politicians, used-car salesmen, TV evangelists, and suits in general), bogon sinks (such as taxpayers and computers), and bogosity potential fields. Bogon absorption causes human beings to behave mindlessly and machines to fail (and may also cause both to emit secondary bogons); however, the precise mechanics of bogon-computron interaction are not yet understood. Quantum bogodynamics is most often invoked to explain the sharp increase in hardware and software failures in the presence of suits; the latter emit bogons, which the former absorb.
  • quantum cryptography — a method of coding information based on quantum mechanics, which is said to be unbreakable
  • quarantine anchorage — an anchorage for ships awaiting a pratique.
  • rankine-cycle engine — a type of steam engine involving a continuous cycle of vaporization of liquid and condensation back to liquid in a sealed system: developed experimentally for use in automobiles to reduce polluting emissions, utilize cheaper fuels, etc.
  • real-time processing — data-processing by a computer which receives constantly changing data, such as information relating to air-traffic control, travel booking systems, etc, and processes it sufficiently rapidly to be able to control the source of the data
  • reciprocating engine — an engine in which one or more pistons move backwards and forwards inside a cylinder or cylinders
  • red badge of courage — a novel (1895) by Stephen Crane.
  • red-winged blackbird — a North American blackbird, Agelaius phoeniceus, the male of which is black with scarlet patches, usually bordered with buff or yellow, on the bend of the wing.
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