18-letter words containing t, r, o, p
- before the present — See B.P (def 4).
- 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
- berwick-upon-tweed — a town in N England, in N Northumberland at the mouth of the Tweed: much involved in border disputes between England and Scotland between the 12th and 16th centuries; neutral territory 1551–1885. Pop: 12 870 (2001)
- 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.
- birth control pill — an oral contraceptive for women, containing the hormones estrogen and progesterone or progesterone alone, that inhibits ovulation, fertilization, or implantation of a fertilized ovum, causing temporary infertility.
- birth-control pill — an oral contraceptive for women, containing the hormones estrogen and progesterone or progesterone alone, that inhibits ovulation, fertilization, or implantation of a fertilized ovum, causing temporary infertility.
- 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
- born to the purple — being of royal or high birth
- 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
- byte-code compiler — (programming, tool) A compiler which outputs a program in some kind of byte-code. Compare: byte-code interpreter.
- 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.
- 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.
- 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
- 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.
- centre of pressure — the point in a body at which the resultant pressure acts when the body is immersed in a fluid
- 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.
- christmas shopping — shopping especially for Christmas presents, but also for Christmas food and drink, and all the other things required over the Christmas period.
- christopher sholes — Christopher Latham [ley-thuh m,, -th uh m] /ˈleɪ θəm,, -ðəm/ (Show IPA), 1819–90, U.S. inventor of the typewriter.
- 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.
- claustrophobically — In a claustrophobic way.
- cleopatra's needle — either of two Egyptian obelisks, originally set up at Heliopolis about 1500 bc: one was moved to the Thames Embankment, London, in 1878, the other to Central Park, New York, in 1880
- closed corporation — a corporation the stock of which is owned by a small number of persons and is rarely traded on the open market
- coitus interruptus — the deliberate withdrawal of the penis from the vagina before ejaculation
- color transparency — a positive color image photographically produced on transparent film or glass and viewed by transmitted light, usually by projection.
- colour photography — the art or process of taking and developing photographs in colour
- colour temperature — the temperature of a black-body radiator at which it would emit radiation of the same chromaticity as the light under consideration
- comb-footed spider — any of numerous spiders constituting the family Theridiidae, having a comblike row of bristles on the tarsi of the hind legs.
- combined operation — a military operation carried out jointly by allied forces
- come the raw prawn — to attempt deception
- come to grips with — If you come to grips with a problem, you consider it seriously, and start taking action to deal with it.
- commando operation — a major operation for treatment of cancer of the head and neck, involving removal of many facial structures and subsequent surgical reconstruction
- community property — the joint ownership of the property of a husband and wife
- comparative method — a body of procedures and criteria used by linguists to determine whether and how two or more languages are related and to reconstruct forms of their hypothetical parent language.