21-letter words containing p, a, c, m, n
- advanced photo system — a system that enables photographs in different formats to be taken on the same (small) roll of film
- afternoon performance — a performance during the afternoon, rather than the evening
- aids dementia complex — a brain disorder in people with AIDS that causes severe irreparable memory loss and disorientation, affecting the ability to function in social or work settings. Abbreviation: ADC.
- airborne command post — any of several converted commercial aircraft equipped with special communications and code gear, intended as flying bunkers for the president, secretary of defense, military commanders, or their designated replacements.
- algorithm description — (language) (ALDES) ["The Algorithm Description Language ALDES", R.G.K. Loos, SIGSAM Bull 14(1):15-39 (Jan 1976)].
- alpha centauri system — a star system comprising the binary star Alpha Centauri A and B and Proxima Centauri (also called Alpha Centauri C), which is 0.1 light years closer to the sun. Visual magnitude: 0.01 (A), 1.33 (B); spectral type: G2V (A); distance from earth: 4.3 light years
- antihemophilic factor — a protein that is essential to normal blood clotting and is lacking or deficient in persons having hemophilia A. Abbreviation: AHF.
- appalachian mountains — a mountain system of E North America, extending from Quebec province in Canada to central Alabama in the US: contains rich deposits of anthracite, bitumen, and iron ore. Highest peak: Mount Mitchell, 2038 m (6684 ft)
- archimedes' principle — a law of physics stating that the apparent upward force (buoyancy) of a body immersed in a fluid is equal to the weight of the displaced fluid
- atmospheric inversion — inversion (def 12).
- atmospheric-inversion — an act or instance of inverting.
- automatic hyphenation — (text) A feature of some word processors which can insert hyphens into words which would otherwise extend beyond the right hand margin of the page. More advanced word processors may have options to control the position of the hyphen, to restrict certain words from being hyphenated, and to allow custom dictionaries of hyphenation points to be built up.
- book of common prayer — the official book of church services of the Church of England, until 1980, when the Alternative Service Book was sanctioned
- carrie chapman l catt — Carrie Chapman Lane, 1859–1947, U.S. leader in women's suffrage movements.
- central european time — the standard time adopted by Western European countries one hour ahead of Greenwich Mean Time, corresponding to British Summer Time
- character development — the portrayal of people in a work of fiction in such a way that the reader or audience seems to learn more about them as they develop
- column chromatography — the separation of mixtures into their constituents by preferential adsorption by a solid, as a column of silica (column chromatography) or a strip of filter paper (paper chromatography) or by a gel.
- combination principle — Ritz combination principle.
- committal proceedings — a preliminary hearing in a magistrates' court to decide if there is a case to answer
- companionate marriage — a proposed system of trial marriage in which the couple would postpone having children and could be divorced by mutual consent, until a final decision to stay married is reached
- comparative statement — a financial statement with figures arranged in two or more parallel columns, each column representing a fiscal year or other period, used to compare performance between periods.
- comparison microscope — a microscope having two objective lenses and using a system of prisms to form in one eyepiece adjacent images of two different objects.
- compensation neurosis — an unconscious attempt to retain physical or psychological symptoms of illness when some advantage may be obtained (distinguished from malingering).
- competitive advantage — an advantage based on success in competition
- completing the square — a method, usually of solving quadratic equations, by which a quadratic expression, as x 2 − 4 x + 3, is written as the sum or difference of a perfect square and a constant, x 2 − 4 x + 4 + 3 − 4 = (x − 2) 2 − 1, by addition and subtraction of appropriate constant terms.
- componential analysis — the analysis of a set of related linguistic items, especially word meanings, into combinations of features in terms of which each item may be compared with every other, as in the analysis of man into the semantic features “male,” “mature,” and “human,” woman into “female,” “mature,” and “human,” girl into “female,” “immature,” and “human,” and bull into “male,” “mature,” and “bovine.”.
- computer aided design — (application) (CAD) The part of CAE concerning the drawing or physical layout steps of engineering design. Often found in the phrase "CAD/CAM" for ".. manufacturing".
- computer-aided design — the use of computer techniques in designing products, esp involving the use of computer graphics
- compuware corporation — (company) A US software and service company established in 1973. Since 1973, Compuware focused on optimising business software development, testing and operation. In 1999 the company had grown to over 15,000 employees worldwide and revenues of more than $1.6B. By 2013 it had shrunk to less than 5000. Current (2013) products and services include performance optimisation, availability and quality of web, non-web, mobile, streaming and cloud applications; project portfolio management, professional services automation; mainframe applications and developer tools; rapid application development and professional services.
- cooperative apartment — a block of flats belonging to a corporation in which shares are owned in proportion to the relative value of the flat occupied
- cooperative-apartment — working or acting together willingly for a common purpose or benefit.
- coordination compound — complex (def 10).
- countably compact set — a set for which every cover consisting of a countable number of sets has a subcover consisting of a finite number of sets.
- court of common pleas — (formerly) a superior court exercising jurisdiction in civil actions between private citizens
- crankcase compression — Crankcase compression is the method of starting some smaller two-stroke engines, where the mixture charge is compressed in a sealed crankcase by the descending piston before passing to the combustion chamber.
- cyclical unemployment — unemployment caused by fluctuations in the level of economic activity inherent in trade cycles
- datamatic corporation — Honeywell
- dead from the neck up — stupid or unintelligent
- decompression chamber — a chamber in which the pressure of air can be varied slowly for returning people from abnormal pressures to atmospheric pressure without inducing decompression sickness
- department of justice — the department of the U.S. federal government charged with the responsibility for the enforcement of federal laws. Abbreviation: DOJ.
- development education — an area of study that aims to give pupils an understanding of their involvement in world affairs
- diapason normal pitch — a standard of pitch in which A above middle C is established at 435 vibrations per second.
- displacement activity — a behavior performed out of its usual context and apparently irrelevant to the prevailing situation, as eating when an unknown individual approaches, tending to occur when appropiate behaviors, as attacking or fleeing, are in conflict or obstructed.
- electric displacement — the electric flux density when an electric field exists in free space into which a dielectric is introduced
- electroencephalograms — Plural form of electroencephalogram.
- electromagnetic pulse — a surge of electromagnetic radiation, esp one resulting from a nuclear explosion, which can disrupt electronic devices and, occasionally, larger structures and equipment
- electronystagmography — A diagnostic test to record involuntary movements of the eye caused by a condition known as nystagmus. It can also be used to diagnose the cause of vertigo, dizziness or balance dysfunction by testing the vestibular system.
- endoplasmic reticulum — an extensive intracellular membrane system whose functions include synthesis and transport of lipids and, in regions where ribosomes are attached, of proteins
- epidemic encephalitis — any type of widespread encephalitis caused by various viruses
- exposure compensation — the act of overriding a camera's automatic exposure in order to achieve a particular effect or due to difficult lighting conditions
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