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20-letter words containing o, a

  • antigestational drug — a drug that averts a pregnancy by preventing the fertilized egg from becoming implanted in the uterine wall.
  • antimony oxychloride — a white, water-insoluble powder, SbOCl, used chiefly in the manufacture of antimony salts.
  • antimony trifluoride — a white to grayish-white, crystalline, hygroscopic, water-soluble, poisonous solid, SbF 3 , used chiefly in dyeing textiles.
  • antonello da messina — ?1430–?79, Italian painter, born in Sicily. His paintings include St Jerome in His Study and Portrait of a Man
  • antony and cleopatra — a tragedy (1606–07?) by Shakespeare.
  • aortic insufficiency — abnormal closure of the aortic valve resulting in regurgitation of blood to the left ventricle.
  • apollonius of rhodes — 3rd century bc, Greek epic poet and head of the Library of Alexandria. His principal work is the four-volume Argonautica
  • apostolic succession — the doctrine that the authority of Christian bishops derives from the Apostles through an unbroken line of consecration
  • apothecaries' weight — a system of weights, formerly used in pharmacy, based on the Troy ounce, which contains 480 grains. 1 grain is equal to 0.065 gram
  • apparent candlepower — a measure of the luminous intensity of an extended source of light in terms of the candlepower of a point source of light that has an equivalent luminous intensity when placed at the same distance as the extended source.
  • apple computer, inc. — (company)   Manufacturers of the Macintosh range of personal computers as well as the earlier Apple I, Apple II and Lisa. Founded on 1 April 1976 by Steve Jobs and Steve Wozniak. Apples were among the first microcomputers. They originally used the 6502 processor and are still being made (August 1994), now using the 65816. The Apple II line, which includes the Apple I, is the longest existing line of microcomputers. Steve Jobs left Apple (involuntarily) and started NeXT and later returned when Apple bought NeXT in late 1997(?). Quarterly sales $2150M, profits $138M (Aug 1994). http://apple.com/.
  • application software — software designed for a specific need or purpose
  • applications package — a specialized program or set of specialized programs and associated documentation designed to carry out a particular task
  • applications program — a program that is written and designed for specific needs or purposes
  • arbitration tribunal — a tribunal set up to settle a dispute by arbitration
  • arches national park — a national park in E Utah: natural arch formations. 114 sq. mi. (295 sq. km).
  • archiepiscopal cross — patriarchal cross.
  • architectural bronze — a brass alloy of about 57 percent copper, 41 percent zinc, and 2 percent lead.
  • argument from design — the argument for the existence of God based on the assumption that order in the universe implies an orderer and cannot be a natural feature of the universe.
  • aristarchus of samos — 3rd century bc, Greek astronomer who anticipated Copernicus in advancing the theory that the earth revolves around the sun
  • arrested development — physical development that is not complete
  • articulatory feature — a property of a speech sound based on its voicing or on its place or manner of articulation in the vocal tract, as voiceless, bilabial, or stop used in describing the sound (p).
  • artificial harmonics — harmonics of a note produced on a stringed instrument by lightly touching a stopped sounded string.
  • artificial selection — a process in the breeding of animals and in the cultivation of plants by which the breeder chooses to perpetuate only those forms having certain desirable inheritable characteristics.
  • aschheim-zondek test — a test used to detect whether a woman is pregnant by noting the effect on the ovaries of an immature mouse or rabbit injected with her urine.
  • asexual reproduction — reproduction, as budding, fission, or spore formation, not involving the union of gametes.
  • asian tiger mosquito — a mosquito, Aedes albopictus, native to Asia, that transmits yellow fever and dengue and possibly West Nile virus. Compare yellow-fever mosquito.
  • assessment procedure — an established method of assessing students or workers
  • asset turnover ratio — An asset turnover ratio is a measure of the efficiency of a company, that is calculated by dividing sales for a period by average total assets.
  • associated statehood — the semi-independent political status of various former British colonies in the Caribbean from 1967 until each became an independent state in the British Commonwealth, by which Britain retained responsibility for defence and some aspects of foreign affairs. The associated states were Anguilla, Antigua, Dominica, Grenada, St Kitts-Nevis, St Lucia, and St Vincent and the Grenadines
  • association football — soccer
  • association of stars — a sparsely populated group of between 10 and 1000 young stars of similar spectral type and common origin that are moving too fast to form a permanent, gravitationally bound system.
  • astatic galvanometer — a galvanometer that is unaffected by the earth's magnetic field and is used for measuring small currents.
  • at one's convenience — at a time, or in a place or manner, suitable to one
  • at one's finger tips — the tip or end of a finger.
  • at someone's expense — If you do something at someone's expense, they provide the money for it.
  • at someone's service — ready to serve or cooperate with someone
  • at the best of times — You say at the best of times when you are making a negative or critical comment to emphasize that it is true even when the circumstances are as favourable as possible.
  • at the bottom of sth — If something is at the bottom of a problem or unpleasant situation, it is the real cause of it.
  • at the crack of dawn — If you say that someone does something at the crack of dawn, you are emphasizing that they do it very early in the morning.
  • at the drop of a hat — If you say that you are ready to do something at the drop of a hat, you mean that you are willing to do it immediately, without hesitating.
  • at the eleventh hour — at the last moment; just before it is too late
  • at two hours' notice — with notification only two hours in advance
  • atmospheric pressure — Atmospheric pressure is the pressure of the atmosphere on the Earth's surface.
  • attendance allowance — (in Britain) a tax-free noncontributory welfare benefit for people over 65 years old who are so severely disabled that they need frequent attention or continual supervision for a period of six months or more
  • attic salt (or wit) — graceful, piercing wit
  • audio-lingual method — a technique of foreign-language instruction that emphasizes audio-lingual skills over reading and writing and is characterized by extensive use of pattern practice.
  • augur ill (or well) — to be a bad (or good) omen
  • automobile insurance — Automobile insurance is insurance coverage for cars.
  • auxiliary power unit — an additional engine fitted to an aircraft to operate when the main engines are not in use
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