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20-letter words containing m, e, l, a, i

  • most general unifier — (logic)   If U is the most general unifier of a set of expressions then any other unifier, V, can be expressed as V = UW, where W is another substitution. See also unification.
  • mpeg-1 audio layer 1 — (audio, compression, algorithm)   (MP1) A simple 32-subband audio compressor using a floating point representation for subband samples. Resolution and scale factor are stored for groups of 12 subsamples. MP1 is only used for Philips DCC Digital Compact cassette with data rates of 384 kbps.
  • mpeg-1 audio layer 3 — (music, file format)   (MP3) A digital audio compression algorithm that acheives a compression factor of about twelve while preserving sound quality. It does this by optimising the compression according to the range of sound that people can actually hear. MP3 is currently (July 1999) the most powerful algorithm in a series of audio encoding standards developed under the sponsorship of the Moving Picture Experts Group (MPEG) and formalised by the International Organization for Standardization (ISO). MP3 is very different from Layer 2, using an additional MDCT layer to increase frequency resolution. Its scale factor groups are more optimised for the human ear, and it uses nonlinear sample quantisation and Huffman coding. MP3 files (filename extension ".mp3") can be downloaded from many websites and can be played using software available for most operating systems (also downloadable), e.g. Winamp for PC, MacAmp for Macintosh, and mpeg123 for Unix. MP3 files are usually downloaded completely before playing but streaming MP3 is also possible. A program called a "ripper" can be used to copy a selection from a music CD onto your hard disk and another program called an encoder can convert it to an MP3 file.
  • mpeg-2 audio layer 3 — (compression, standard, algorithm, file format)   An extention of MPEG-1 audio layer 3 for lower sampling rates (16-24 kHz) targeting bit rates from 32-64 kbps (possibly 8-160 kbps). It is often combined with MPEG-2 LSF.
  • multicast addressing — Ethernet addressing scheme used to send packets to devices of a certain type or for broadcasting to all nodes. The least significant bit of the most significant byte of a multi-cast address is one.
  • multimedia extension — Matrix Math eXtensions
  • multipart stationery — continuous stationery comprising two or more sheets, either carbonless or with carbon paper between the sheets
  • multiple inheritance — (programming)   In object-oriented programming, the possibility that a class may have more than one direct superclass in the class hierarchy. The opposite is single inheritance.
  • multiple personality — a rare disorder in which an individual displays several functionally dissociated personalities, each of a complexity comparable to that of a normal individual.
  • multiplication table — Arithmetic. a tabular listing of the products of any two numbers of a set, usually of the integers 1 through 10 or 1 through 12.
  • multiplicative group — a group in which the operation of the group is multiplication.
  • multistep hydroplane — a motorship having a flat bottom built as a series of planes inclined forward, the ship planing on each from stem to stern as its speed increases.
  • multistorey car park — a car park consisting of several levels
  • navigable semicircle — the less violent half of a cyclone; the half blowing in the direction opposite to that in which the cyclone is moving and in which a vessel can run before the wind.
  • neapolitan ice cream — variously flavored and colored ice cream and ice mixtures frozen in layers.
  • no lack of something — If you say there is no lack of something, you are emphasizing that there is a great deal of it.
  • nonrepeating decimal — a decimal representation of any irrational number, having the property that no sequence of digits is repeated ad infinitum.
  • north american plate — a major tectonic division of the earth's crust, comprising Greenland and the continent of North America and the suboceanic Labrador and North American Basins, and bounded on the east by the Mid-Atlantic Ridge, on the south by the Caribbean and South American Plates, and on the west by the San Andreas fault and Aleutian Trench.
  • objective relativism — the doctrine that knowledge of real objects is relative to the individual.
  • omega-minus particle — a baryon with strangeness −3, isotopic spin 0, and negative charge; predicted from the mathematics of the Eightfold Way and subsequently discovered. Symbol: Ω −.
  • one's spiritual home — Your spiritual home is the place where you feel that you belong, usually because your ideas or attitudes are the same as those of the people who live there.
  • ontological argument — an a priori argument for the existence of God, asserting that as existence is a perfection, and as God is conceived of as the most perfect being, it follows that God must exist; originated by Anselm, later used by Duns Scotus, Descartes, and Leibniz.
  • optical mark reading — the reading of marks by an optical device whereby the information can be stored in machine-readable form
  • parametric amplifier — a device, as an electron tube or transistor, that amplifies a high-frequency input signal by sinusoidally varying the reactance of the circuit.
  • parametric equalizer — an electronic device for cutting or boosting selected frequencies by continuous narrowing or widening of the frequencies to be filtered
  • particle beam weapon — a weapon that fires particle beams into the atmosphere or space
  • pass in one's marble — to die
  • pentobarbital sodium — a barbiturate drug used in medicine as a sedative and hypnotic. Formula: C11H17N2O3Na
  • periodontal membrane — the collagenous, fibrous connective tissue between the cementum of the tooth and the alveolus.
  • permonosulfuric acid — persulfuric acid (def 1).
  • phenyldiethanolamine — a white, crystalline, slightly water-soluble substance, C 1 0 H 1 5 NO 2 , used in the manufacture of dyes and in organic synthesis.
  • physical examination — an examination, usually by a physician, of a person's body in order to determine his or her state of health or physical fitness, as for military service or participation in a sport.
  • physical meteorology — the branch of meteorology dealing with the study of optical, electrical, acoustical, and thermodynamic phenomena in the atmosphere, including the physics of clouds and precipitation.
  • pico della mirandola — Count Giovanni [jaw-vahn-nee] /dʒɔˈvɑn ni/ (Show IPA), 1463–94, Italian humanist and writer.
  • play merry hell with — to disturb greatly; disrupt
  • polaroid land camera — any of several types of camera yielding a finished print by means of a special developing and processing technique that occurs inside the camera and takes only a few seconds to complete
  • population parameter — a quantity or statistical measure that, for a given population, is fixed and that is used as the value of a variable in some general distribution or frequency function to make it descriptive of that population: The mean and variance of a population are population parameters.
  • potassium binoxalate — a white, crystalline, hygroscopic, poisonous solid, KHC 2 O 4 , that is usually hydrated: used chiefly for removing ink stains, cleaning metal and wood, and in photography.
  • practical imperative — (in Kantian ethics) the dictum that one should treat oneself and all humanity as an end and never as a means.
  • premenstrual tension — Premenstrual tension is the same as premenstrual syndrome. The abbreviation PMT is often used.
  • prenuptial agreement — A prenuptial agreement is a written contract made between a man and a woman before they marry, in which they state how their assets such as property and money should be divided if they get divorced.
  • presidential primary — a direct primary for the selection of state delegates to a national party convention and the expression of preference for a U.S. presidential nominee.
  • primary optical area — a point in or toward the upper left-hand corner of a printed page, advertisement, or the like, looked at first in reading. Abbreviation: POA.
  • primitive polynomial — a polynomial that has content equal to 1. Compare content1 (def 11a).
  • prince william sound — a sound in the Gulf of Alaska, on the S coast of Alaska: S end of Trans-Alaska oil pipeline at port of Valdez.
  • programming language — a high-level language used to write computer programs, as COBOL or BASIC, or, sometimes, an assembly language.
  • psychological moment — the proper or critical time for achieving a desired result: She found the right psychological moment to make her request.
  • punch a (time) clock — to insert a timecard into a time clock when coming to or going from work
  • quantum field theory — any theory in which fields are treated by the methods of quantum mechanics; each field can then be regarded as consisting of particles of a particular kind, which may be created and annihilated.
  • real-time processing — data-processing by a computer which receives constantly changing data, such as information relating to air-traffic control, travel booking systems, etc, and processes it sufficiently rapidly to be able to control the source of the data
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