20-letter words containing a, c, e, s
- (staring) into space — If you are staring into space, you are looking straight in front of you, without actually looking at anything in particular, for example because you are thinking or because you are feeling shocked.
- a lick and a promise — something hastily done, esp a hurried wash
- a shoulder to cry on — If someone offers you a shoulder to cry on or is a shoulder to cry on, they listen sympathetically as you talk about your troubles.
- absolute convergence — the property of an infinite series in which the series formed by replacing each term in the original series with its absolute value converges. Compare conditional convergence.
- abstract syntax tree — (compiler) (AST) A data structure representing something which has been parsed, often used as a compiler or interpreter's internal representation of a program while it is being optimised and from which code generation is performed. The range of all possible such structures is described by the abstract syntax.
- accessory chromosome — B chromosome.
- acetylcholinesterase — an enzyme in nerve cells that is responsible for the destruction of acetylcholine and thus for switching off excitation of the nerve
- acetylsalicylic acid — aspirin
- acorn computers ltd. — (company) A UK computer manufacturer, part of the Acorn Computer Group plc. Acorn was founded on 1978-12-05, on a kitchen table in a back room. Their first creation was an electronic slot machine. After the Acorn System 1, 2 and 3, Acorn launched the first commercial microcomputer - the ATOM in March 1980. In April 1981, Acorn won a contract from the BBC to provide the PROTON. In January 1982 Acorn launched the BBC Microcomputer System. At one time, 70% of microcomputers bought for UK schools were BBC Micros. The Acorn Computer Group went public on the Unlisted Securities Market in September 1983. In April 1984 Acorn won the Queen's Award for Technology for the BBC Micro and in September 1985 Olivetti took a controlling interest in Acorn. The Master 128 Series computers were launched in January 1986 and the BBC Domesday System in November 1986. In 1983 Acorn began to design the Acorn RISC Machine (ARM), the first low-cost, high volume RISC processor chip (later renamed the Advanced RISC Machine). In June 1987 they launched the Archimedes range - the first 32-bit RISC based microcomputers - which sold for under UKP 1000. In February 1989 the R140 was launched. This was the first Unix workstation under UKP 4000. In May 1989 the A3000 (the new BBC Microcomputer) was launched. In 1990 Acorn formed Advanced RISC Machines Ltd. (ARM) in partnership with Apple Computer, Inc. and VLSI to develop the ARM processor. Acorn has continued to develop RISC based products. With 1992 revenues of 48.2 million pounds, Acorn Computers was the premier supplier of Information Technology products to UK education and had been the leading provider of 32-bit RISC based personal computers since 1987. Acorn finally folded in the late 1990s. Their operating system, RISC OS was further developed by a consortium of suppliers.
- acquis communautaire — European Union laws
- action at a distance — the supposed interaction of two separated bodies without any intervening medium. In modern theories all interactions are assumed to require a field of force
- activex data objects — (database, Microsoft, programming) (ADO) Microsoft's library for accessing data sources through OLE DB. Typically it is used to query or modify data stored in a relational database.
- acts of the apostles — the fifth book of the New Testament, describing the development of the early Church from Christ's ascension into heaven to Paul's sojourn at Rome
- administrative court — a court that specializes in dealing with cases relating to the way in which government bodies exercise their powers
- adrenocorticosteroid — corticosteroid
- advertising campaign — An advertising campaign is a planned series of advertisements.
- aids-related complex — a condition that may develop into AIDS, characterized by the enlargement of the lymph nodes
- air consignment note — a nonnegotiable shipping document evidencing the contract between shipper and air carrier for transportation and delivery of cargo. Abbreviation: AWB.
- air-raid precautions — measures taken to protect the public from air-raid attacks
- algebraic expression — a symbol or a combination of symbols used in algebra, containing one or more numbers, variables, and arithmetic operations: how to solve algebraic expressions.
- amana church society — a Christian community in Iowa governed by elders, with no ordained clergy: founded in Germany in 1714, in America since 1843
- amicus usque ad aras — a friend to the last degree.
- analysis of variance — any of a number of techniques for resolving the observed variance between sets of data into components, esp to determine whether the difference between two samples is explicable as random sampling variation with the same underlying population
- analytical chemistry — a branch of chemistry that deals with the identification of compounds and mixtures (qualitative analysis) or the determination of the proportions of the constituents (quantitative analysis): techniques commonly used are titration, precipitation, spectroscopy, chromatography, etc.
- angular displacement — the angle through which a point, line, or body is rotated about a specific axis in a given direction
- anniversary reaction — a psychological reaction, as depression, occurring at a regularly fixed time and associated with the recollection of an emotionally upsetting past experience, as loss of a loved one.
- anti-intellectualism — a feeling of hostility and dislike towards intellectuals and intellectual activities
- anti-motion-sickness — combatting the effects of motion sickness
- anticrepuscular arch — antitwilight arch.
- aortic insufficiency — abnormal closure of the aortic valve resulting in regurgitation of blood to the left ventricle.
- 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
- 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
- arches national park — a national park in E Utah: natural arch formations. 114 sq. mi. (295 sq. km).
- archiepiscopal cross — patriarchal cross.
- artificial satellite — a man-made device orbiting around the earth, moon, or another planet transmitting to earth scientific information or used for communication
- 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.
- asleep at the switch — a slender, flexible shoot, rod, etc., used especially in whipping or disciplining.
- assessment procedure — an established method of assessing students or workers
- 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
- astatic galvanometer — a galvanometer that is unaffected by the earth's magnetic field and is used for measuring small currents.
- asymmetrical warfare — warfare between a powerful military force and a weak guerilla force
- at one's convenience — at a time, or in a place or manner, suitable to one
- at someone's service — ready to serve or cooperate with someone
- 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.
- attacks as a service — (security, legal) A kind of cybercrime as a service in which the service provider performs denial of service attacks on behalf of others for money.
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