18-letter words containing at
- 16-bit application — (operating system) Software for MS-DOS or Microsoft Windows which originally ran on the 16-bit Intel 8088 and 80286 microprocessors. These used a segmented address space to extend the range of addresses from what is possible with just a 16-bit address. Programs with more than 64 kilobytes of code or data therefore had to waste time switching between segments. Furthermore, programming with segments is more involved than programming in a flat address space, giving rise to warts like memory models in C and C++. Compare 32-bit application.
- 32-bit application — (architecture, operating system) IBM PC software that runs in a 32-bit flat address space. The term 32-bit application came about because MS-DOS and Microsoft Windows were originally written for the Intel 8088 and 80286 microprocessors. These are 16 bit microprocessors with a segmented address space. Programs with more than 64 kilobytes of code and/or data therefore had to switch between segments quite frequently. As this operation is quite time consuming in comparison to other machine operations, the application's performance may suffer. Furthermore, programming with segments is more involved than programming in a flat address space, giving rise to some complications in programming languages like "memory models" in C and C++. The shift from 16-bit software to 32-bit software on IBM PC clones became possible with the introduction of the Intel 80386 microprocessor. This microprocessor and its successors support a segmented address space with 16-bit and 32 bit segments (more precisely: segments with 16- or 32-bit address offset) or a linear 32-bit address space. For compatibility reasons, however, much of the software is nevertheless written in 16-bit models. See also Win32s.
- abstract data type — (programming) (ADT) A kind of data abstraction where a type's internal form is hidden behind a set of access functions. Values of the type are created and inspected only by calls to the access functions. This allows the implementation of the type to be changed without requiring any changes outside the module in which it is defined. A classic example of an ADT is a stack data type for which functions might be provided to create an empty stack, to push values onto a stack and to pop values from a stack.
- acadian flycatcher — a small, greenish tyrant flycatcher (Empidonax virescens) found in deciduous forests of E North America
- accelerated reader — a teaching device into which a page of reading material is inserted and advanced one line at a time, gradually increasing the speed to accelerate and improve one's rate of reading comprehension.
- accommodation bill — a bill of exchange cosigned by a guarantor: designed to strengthen the acceptor's credit
- accommodation line — insurance that, by itself, would not be acceptable to an insurer but is written in connection with other policies as an accommodation to an agent or broker.
- accommodation road — a road that serves residential properties or a piece of land but which is not considered a public highway
- accumulation point — a point such that every neighborhood of the point contains at least one point in a given set other than the given point.
- acid precipitation — meteorological precipitation that is relatively acidic.
- activated charcoal — a form of carbon having very fine pores: used chiefly for adsorbing gases or solutes, as in various filter systems for purification, deodorization, and decolorization.
- acute inflammation — body's response to infection
- adaptive radiation — evolution of a number of divergent species from a common ancestor, each species becoming adapted to occupy a different environment. This type of evolution occurred in the Tertiary manuals and the Mesozoic reptiles
- adenocarcinomatous — Of or pertaining to adenocarcinomas.
- adjournment debate — (in the UK) a short debate, held immediately before the end of each day's business in the House of Commons, in which backbench MPs raise matters relating to their constituencies
- administrative law — law relating to the control of government power
- affirmative action — Affirmative action is the policy of giving jobs and other opportunities to members of groups such as racial minorities or women who might not otherwise have them.
- age discrimination — discrimination against older people, especially by employers
- aggravated assault — an offence in which a person attacks someone physically, made more serious by its violent circumstances
- aggravated robbery — a robbery made more serious by its violent circumstances
- aids-related virus — a variant of the AIDS virus. Abbreviation: ARV.
- air national guard — a national guard organization similar to and coordinate with the U.S. Air Force.
- airspeed indicator — a dial that indicates the airspeed at which an aircraft is travelling
- algebraic equation — an equation in the form of a polynomial having a finite number of terms and equated to zero, as 2 x 3 + 4 x 2 − x + 7 = 0.
- algebraic notation — the standard method of denoting the squares on the chessboard, by allotting a letter, a, b, c, up to h, to each of the files running up the board from White's side, starting from the left, and a number to each of the ranks across the board, starting with White's first rank
- alternate straight — a hand consisting of five cards following one another by two in order of denomination, as a five, seven, nine, jack, and king, being of special value in certain games.
- alternating series — a series, usually infinite, in which successive terms have opposite signs, as 1 − ½ + ¼ − ⅛ +. ….
- alternative comedy — a style of comedy originating in the UK in the 1980s that seeks to avoid racist or sexist stereotypes, and usually puts forward left-wing, anti-establishment views
- alternative energy — a form of energy derived from a natural source, such as the sun, wind, tides, or waves
- alternative school — any public or private school having a special curriculum, especially an elementary or secondary school offering a more flexible program of study than a traditional school.
- alumina trihydrate — a crystalline, water-insoluble powder, Al(OH) 3 or Al 2 O 3 ⋅3H 2 O, obtained chiefly from bauxite: used in the manufacture of glass, ceramics, and printing inks, in dyeing, and in medicine as an antacid and in the treatment of ulcers.
- aluminium sulphate — a white crystalline salt used in the paper, textile, and dyeing industries and in the purification of water. Formula: Al2(SO4)3
- aluminum glycinate — a white, bland-tasting powder, C 2 H 6 AlNO 4 , that is used as an antacid.
- amdahl corporation — (company) A US computer manufacturer. Amdahl is a major supplier of large mainframes, UNIX and Open Systems software and servers, data storage subsystems, data communications products, applications development software, and a variety of educational and consulting services. Amdahl products are sold in more than 30 countries for use in both open systems and IBM plug-compatible mainframe computing environments. Quarterly sales $397M, profits $13M (Aug 1994). In 1997 Amdahl became a division of Fujitsu.
- ammonium carbamate — a white soluble crystalline compound produced by reaction between dry ammonia and carbon dioxide and used as a nitrogen fertilizer. Formula: (NH4)CO2NH2
- ammonium carbonate — an unstable pungent soluble white powder that is a double salt of ammonium bicarbonate and ammonium carbamate: used in the manufacture of baking powder, smelling salts, and ammonium compounds. Formula: (NH4)HCO3.(NH4)CO2NH2
- ammonium phosphate — monoammonium phosphate.
- ammonium purpurate — murexide.
- angle of deviation — the angle between the direction of the refracted ray and the direction of the incident ray when a ray of light passes from one medium to another
- angle of elevation — elevation (def 8a).
- anti-globalization — a political belief opposed to the emergence of a single world market dominated by multinational companies
- anti-miscegenation — marriage or cohabitation between two people from different racial groups, especially, in the U.S., between a black person and a white person: In 1968 the Supreme Court ruled unanimously that state laws prohibiting miscegenation were unconstitutional.
- anticipated profit — the profit that one expects to make from a deal, transaction, or project
- antidiscrimination — (legal) Opposing or disallowing discrimination.
- antipatheticalness — The state or quality of being antipathetical.
- antisegregationist — opposed to the segregation of different races in any human activity
- antivaccinationist — One who is opposed to the practice of vaccination.
- apostolic delegate — a representative of the pope sent to countries that do not have full or regular diplomatic relations with the Holy See
- apparatus criticus — textual notes, list of variant readings, etc, relating to a document, esp in a scholarly edition of a text
- appellate division — the section of a court that hears appeals, sometimes existing as an intermediate court between a trial court and a court of last resort.
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