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18-letter words containing a, p, r, t

  • asymptotic freedom — a property of the force between quarks, according to quantum chromodynamics, such that they behave almost like free particles when they are close together within a hadron.
  • at your fingertips — If you say that something is at your fingertips, you approve of the fact that you can reach it easily or that it is easily available to you.
  • athletic supporter — jockstrap
  • atmospheric engine — an early form of single-acting engine in which the power stroke is provided by atmospheric pressure acting upon a piston in an exhausted cylinder.
  • atmospheric window — wavelengths of the electromagnetic spectrum that can be transmitted through the earth's atmosphere. Atmospheric windows occur in the visible, infrared, and radio regions of the spectrum
  • auditory phonetics — the branch of phonetics concerned with the perception of speech sounds by humans
  • australopithecines — Plural form of australopithecine.
  • authorized capital — the total amount of value of the shares that a company is allowed to distribute
  • autobiographically — In a autobiographical manner.
  • automatic exposure — the automatic adjustment of the lens aperture and shutter speed of a camera by a control mechanism
  • avoirdupois weight — a British and American system of weights based on a pound of 16 ounces
  • bachelor apartment — a flat consisting of one room that is used as a sitting room and bedroom, as well as a kitchenette and a bathroom
  • bachelorette party — A bachelorette party is a party for a woman who is getting married very soon, to which only women are invited.
  • bankers-acceptance — a draft or bill of exchange that a bank has accepted. Abbreviation: BA. Also called banker's acceptance. Compare acceptance (def 6).
  • barbershop quartet — a group of four singers who perform a style of music sung in four-part harmony
  • baritone saxophone — the second lowest instrument in the family of saxophones
  • basement apartment — an apartment below the ground floor of a building
  • behaviour patterns — the characteristic ways in which a person or animal acts
  • benchmark position — a public service job used for comparison with a similar position, such as a position in commerce, for wage settlements
  • bichromate process — any of several methods of photography in which the light-sensitive medium is alkaline bichromate associated with a colloid such as gum, albumen, or gelatin.
  • biological parents — the biological mother and father of a child
  • biological therapy — biotherapy
  • bipolar transistor — (electronics)   A transistor made from a sandwich of n- and p-type semiconductor material: either npn or pnp. The middle section is known as the "base" and the other two as the "collector" and "emitter". When used as an amplifying element, the base to emitter junction is in a "forward-biased" (conducting) condition, and the base to collector junction is "reverse-biased" or non-conducting. Small changes in the base to emitter current (the input signal) cause either holes (for pnp devices) or free electrons (for npn) to enter the base from the emitter. The attracting voltage of the collector causes the majority of these charges to cross into and be collected by the collector, resulting in amplification. Contrast field effect transistor.
  • blocking capacitor — a capacitor that blocks the passage of direct current but allows alternating current to pass
  • borax pentahydrate — a white, crystalline, water-soluble solid, Na 2 B 4 O 7 ⋅5H 2 O, used chiefly for killing weeds, as a water softener, and as a disinfectant and deodorizing agent.
  • bore the pants off — to bore extremely
  • brand-name product — A brand-name product is one which is made by a well-known manufacturer and has the manufacturer's label on it.
  • burkitt's lymphoma — a cancer characterized by tumors containing lymphoid cells, occurring esp. in children, in the jaw, eyes, and internal organs: it is associated with the Epstein-Barr virus
  • c-reactive protein — a globulin in the blood produced by the liver in response to inflammation
  • calcium propionate — a white, water-soluble powder, CaC 6 H 10 O 4 , used in bakery products to inhibit the growth of fungi.
  • campaign furniture — furniture, as chests or desks, having metal hinges on the corners and handles on the sides.
  • cape breton island — an island off SE Canada, in NE Nova Scotia, separated from the mainland by the Strait of Canso: its easternmost point is Cape Breton. Pop: 132 298 (2006). Area: 10 280 sq km (3970 sq miles)
  • career development — a progression through a series of jobs, each with more responsibility and a higher income than the last
  • carpenterworm moth — any moth of the family Cossidae, as Prionoxystus robiniae of the U.S. and southern Canada, whose larvae bore into the trunks and branches of oaks, locusts, and other trees.
  • carthaginian peace — the treaty by which Rome reduced Carthage to the status of a puppet state in 201 b.c.
  • castration complex — an unconscious fear of having one's genitals removed, as a punishment for wishing to have sex with a parent
  • catastrophe theory — a mathematical theory that classifies surfaces according to their form
  • caterpillar hunter — any of various carabid beetles of the genus Calosoma, of Europe and North America, which prey on the larvae of moths and butterflies
  • cathode dark space — Crookes dark space.
  • cellular telephone — a mobile phone
  • central projection — a projection of one plane onto a second plane such that a point on the first plane and its image on the second plane lie on a straight line through a fixed point not on either plane.
  • character graphics — ASCII art
  • checkpoint charlie — a crossing between East and West Berlin during the Cold War
  • chloroacetophenone — a white, crystalline, water-insoluble, poisonous solid, C 8 H 7 ClO, used in solution as a tear gas. Abbreviation: CN.
  • christine de pisan — ?1364–?1430, French poet and prose writer, born in Venice. Her works include ballads, rondeaux, lays, and a biography of Charles V of France
  • christmas shopping — shopping especially for Christmas presents, but also for Christmas food and drink, and all the other things required over the Christmas period.
  • chromatic printing — printing from blocks or types inked with various colours
  • chromolithographer — One engaged in chromolithography.
  • chromolithographic — Pertaining to, or made by, chromolithography.
  • chronostratigraphy — The branch of geology concerned with establishing the absolute ages of strata.
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