23-letter words containing a, f, e, r
- acceleration of gravity — the gravitational acceleration of a freely falling object, expressed in terms of the rate of increase of velocity per second: on earth 980.665 cm (32.17 ft) per second per second is the standard
- act of parliament clock — a pendulum wall clock of the late 18th century, usually having a black dial with gilt numbers: originally installed in English taverns because a burdensome tax prevented many homes from having private clocks.
- ada software repository — (language) A collection of Ada programs?
- affiliation proceedings — (formerly) legal proceedings, usually initiated by an unmarried mother, claiming legal recognition that a particular man is the father of her child, often associated with a claim for financial support
- allowance for bad debts — Allowance for bad debt is a provision made in a company's accounts which recognizes that some debts will not be able to be collected.
- america first committee — a political pressure group that during 1940–41 urged the U.S. not to oppose fascism in Europe or enter World War II.
- animal liberation front — an animal-rights movement founded in Britain, often using direct action
- arthur jeffrey dempster — Arthur Jeffrey, 1886–1950, U.S. physicist.
- articles of association — the constitution and regulations of a registered company as required by the British Companies Acts
- artificial insemination — Artificial insemination is a medical technique for making a woman pregnant by injecting previously stored sperm into her womb. Female animals can also be made pregnant by artificial insemination. The abbreviation AI is also used.
- artificial intelligence — Artificial intelligence is a type of computer technology which is concerned with making machines work in an intelligent way, similar to the way that the human mind works. The abbreviation AI is also used.
- artificial-intelligence — the capacity of a computer to perform operations analogous to learning and decision making in humans, as by an expert system, a program for CAD or CAM, or a program for the perception and recognition of shapes in computer vision systems. Abbreviation: AI, A.I.
- as far as one can judge — If you say that something is true as far as you can judge or so far as you can judge, you are assuming that it is true, although you do not know all the facts about it.
- astronomical refraction — refraction (def 3).
- astronomical-refraction — Physics. the change of direction of a ray of light, sound, heat, or the like, in passing obliquely from one medium into another in which its wave velocity is different.
- at the mercy of someone — If one person or thing is at the mercy of another, the first person or thing is in a situation where they cannot prevent themselves being harmed or affected by the second.
- bachelor of arts degree — a degree conferred on a person who has successfully completed his or her undergraduate studies, usually in a branch of the liberal arts or humanities
- be one for/be a one for — If you say that someone is one for or is a one for something, you mean that they like or approve of it or enjoy doing it.
- bellefontaine neighbors — a city in E Missouri.
- bilinear transformation — Möbius transformation.
- bird-meertens formalism — (theory, programming) (BMF) (Or "Squiggol") A calculus for derivation of functional programs from a specification. It consists of a set of higher-order functions that operate on lists including map, fold, scan, filter, inits, tails, cross product and function composition.
- bird-of-paradise flower — any of various banana-like plants of the genus Strelitzia, esp S. reginae, that are native to tropical southern Africa and South America and have purple bracts and large orange or yellow flowers resembling birds' heads: family Strelitziaceae
- catch someone off guard — If someone catches you off guard, they surprise you by doing something you do not expect. If something catches you off guard, it surprises you by happening when you are not expecting it.
- catherine of alexandria — Saint, a.d. c310, Christian martyr.
- cauchy integral formula — a theorem that gives an expression in terms of an integral for the value of an analytic function at any point inside a simple closed curve of finite length in a domain.
- caught in the crossfire — If you are caught in the crossfire, you become involved in an unpleasant situation in which people are arguing with each other, although you do not want to be involved or say which person you agree with.
- certificate of registry — a document issued to a U.S. vessel engaged in foreign trade, stating its name, nationality, ownership, etc., and claiming for it all privileges pertaining to U.S. nationality.
- characteristic function — a function that assigns the value 1 to the members of a given set and the value 0 to its nonmembers
- chief education officer — an official who is the chief administrative officer of a Local Education Authority
- chief operating officer — the executive in charge of day-to-day operations in an organization
- columbus air force base — U.S. Air Force installation in NE Mississippi, NW of Columbus.
- communication interface — an electronic circuit, usually designed to a specific standard, that enables one machine to telecommunicate with another machine
- communications software — (communications, software) Application programs, operating system components, and probably firmware, forming part of a communication system. These different software components might be classified according to the functions within the Open Systems Interconnect model which they provide. Typical applications include a web browser, Mail User Agent, chat and telnet.
- conjunctive normal form — (logic) (CNF) A logical formula consisting of a conjunction of disjunctions of terms where no disjunction contains a conjunction. Such a formula might also be described as a product of sums. E.g. the CNF of (A and B) or C is (A or C) and (B or C). Contrast Disjunctive Normal Form.
- constant of integration — a constant that is added to the function obtained by evaluating the indefinite integral of a given function, indicating that all indefinite integrals of the given function differ by, at most, a constant.
- correlation coefficient — a statistic measuring the degree of correlation between two variables as by dividing their covariance by the square root of the product of their variances. The closer the correlation coefficient is to 1 or –1 the greater the correlation; if it is random, the coefficient is zero
- corridor of uncertainty — an area of a wicket just outside a batsman's off stump, so located that the batsman will have difficulty in deciding whether or not to play a ball bowled into it
- cost-of-living increase — a pay rise that is given because the cost of living has gone up
- court of first instance — a court in which legal proceedings are begun or first heard
- credit-reference agency — an agency, other than a bank, that specializes in providing credit ratings of people or organizations
- critique of pure reason — a philosophical work (1781) by Immanuel Kant.
- dark-field illumination — illumination of the field of a microscope from the side so that the specimen is viewed against a dark background
- department of education — the department of the U.S. federal government that administers federal programs dealing with education: created in 1979, largely by transfer from part of the former Department of Health, Education, and Welfare. Abbreviation: ED.
- dichlorodifluoromethane — a colourless nonflammable gas easily liquefied by pressure: used as a propellant in aerosols and fire extinguishers and as a refrigerant. Formula: CCl2F2
- differentiable manifold — a manifold having the property that any two overlapping open sets are homeomorphic to locally Euclidean spaces whose coordinates are related by differentiable functions, a property with wide applications in mathematical physics and differential geometry.
- differential compaction — differences in the extent to which sediment is compacted owing to topographic irregularities of the surface on which it is deposited.
- differential psychology — the branch of psychology dealing with the study of characteristic differences or variations of groups or individuals, especially through the use of analytic techniques and statistical methods.
- differential weathering — the difference in degree of discoloration, disintegration, etc., of rocks of different kinds exposed to the same environment.
- dionysius of alexandria — ("the Great") a.d. c190–265, patriarch of Alexandria 247?–265?.
- director of photography — the person who is responsible for all operations concerning camera work and lighting during the production of a film.
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