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# Unit

Unit U"nit, n. [Abbrev. from unity.] 1. A single thing or person. [1913 Webster]

2. (Arith.) The least whole number; one. [1913 Webster]

Units are the integral parts of any large number. --I. Watts. [1913 Webster]

3. A gold coin of the reign of James I., of the value of twenty shillings. --Camden. [1913 Webster]

4. Any determinate amount or quantity (as of length, time, heat, value) adopted as a standard of measurement for other amounts or quantities of the same kind. [1913 Webster]

5. (Math.) A single thing, as a magnitude or number, regarded as an undivided whole. [1913 Webster]

{Abstract unit}, the unit of numeration; one taken in the abstract; the number represented by 1. The term is used in distinction from concrete, or determinate, unit, that is, a unit in which the kind of thing is expressed; a unit of measure or value; as 1 foot, 1 dollar, 1 pound, and the like.

{Complex unit} (Theory of Numbers), an imaginary number of the form a + broot{-1}, when a^{2} + b^{2} = 1.

{Duodecimal unit}, a unit in the scale of numbers increasing or decreasing by twelves.

{Fractional unit}, the unit of a fraction; the reciprocal of the denominator; thus, 1/4 is the unit of the fraction 3/4.

{Integral unit}, the unit of integral numbers, or 1.

{Physical unit}, a value or magnitude conventionally adopted as a unit or standard in physical measurements. The various physical units are usually based on given units of length, mass, and time, and on the density or other properties of some substance, for example, water. See {Dyne}, {Erg}, {Farad}, {Ohm}, {Poundal}, etc.

{Unit deme} (Biol.), a unit of the inferior order or orders of individuality.

{Unit jar} (Elec.), a small, insulated Leyden jar, placed between the electrical machine and a larger jar or battery, so as to announce, by its repeated discharges, the amount of electricity passed into the larger jar.

{Unit of heat} (Physics), a determinate quantity of heat adopted as a unit of measure; a thermal unit (see under {Thermal}). Water is the substance generally employed, the unit being one gram or one pound, and the temperature interval one degree of the Centigrade or Fahrenheit scale. When referred to the gram, it is called the gram degree. The British unit of heat, or thermal unit, used by engineers in England and in the United States, is the quantity of heat necessary to raise one pound of pure water at and near its temperature of greatest density (39.1[deg] Fahr.) through one degree of the Fahrenheit scale. --Rankine.

{Unit of illumination}, the light of a sperm candle burning 120 grains per hour. Standard gas, burning at the rate of five cubic feet per hour, must have an illuminating power equal to that of fourteen such candles.

{Unit of measure} (as of length, surface, volume, dry measure, liquid measure, money, weight, time, and the like), in general, a determinate quantity or magnitude of the kind designated, taken as a standard of comparison for others of the same kind, in assigning to them numerical values, as 1 foot, 1 yard, 1 mile, 1 square foot, 1 square yard, 1 cubic foot, 1 peck, 1 bushel, 1 gallon, 1 cent, 1 ounce, 1 pound, 1 hour, and the like; more specifically, the fundamental unit adopted in any system of weights, measures, or money, by which its several denominations are regulated, and which is itself defined by comparison with some known magnitude, either natural or empirical, as, in the United States, the dollar for money, the pound avoirdupois for weight, the yard for length, the gallon of 8.3389 pounds avoirdupois of water at 39.8[deg] Fahr. (about 231 cubic inches) for liquid measure, etc.; in Great Britain, the pound sterling, the pound troy, the yard, or 1/108719 part of the length of a second's pendulum at London, the gallon of 277.274 cubic inches, etc.; in the metric system, the meter, the liter, the gram, etc.

{Unit of power}. (Mach.) See {Horse power}.

{Unit of resistance}. (Elec.) See {Resistance}, n., 4, and {Ohm}.

{Unit of work} (Physics), the amount of work done by a unit force acting through a unit distance, or the amount required to lift a unit weight through a unit distance against gravitation. See {Erg}, {Foot Pound}, {Kilogrammeter}.

{Unit stress} (Mech. Physics), stress per unit of area; intensity of stress. It is expressed in ounces, pounds, tons, etc., per square inch, square foot, or square yard, etc., or in atmospheres, or inches of mercury or water, or the like. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Synonyms:

### Look at other dictionaries:

• unit — unit …   Dictionnaire des rimes

• Unit — may refer to:In mathematics: * Unit vector, a vector with length equal to 1 * Unit circle, the circle with radius equal to 1, centered at the origin * Unit interval, the interval of all real numbers between 0 and 1 * Imaginary unit, i , whose… …   Wikipedia

• Unit 88 — распавшаяся неонацистская группировка, основанная в Веллингтоне Коллином Уилсоном и также действовала в Окленде, Новая Зеландия. Была наиболее активна в течение 1997 1998 годов. Лидером скинхедов был Джей Бар. Группировка Unit 88 действовала …   Википедия

• Unit — 〈[ ju:nıt] f. 10〉 1. 〈Päd.〉 Lerneinheit, Lernschritt (in Unterrichtsprogrammen) 2. (bei techn. Geräten) fertige Einheit 3. 〈allg.〉 Arbeitsgruppe, Team [engl., „Einheit“] * * * Unit [ ju:nɪt], die; , s [engl. unit, rückgeb. aus: unity < mengl.… …   Universal-Lexikon

• Unit 88 — is a minor neo Nazi organisation based in Auckland, New Zealand. The movement was investigated by the Race Relations Office for distributing pro Nazi literature in 1997 [http://www.hartford hwp.com/archives/24/053.html] . The investigation was… …   Wikipedia

• Unit 4 + 2 — war eine britische Rockband, die Mitte der 60er Jahre insbesondere durch den Hit „Concrete and Clay“ in England und den USA recht bekannt war und heute Kultstatus genießt. Gegründet wurde die Band 1963 in Hertfordshire von Peter Moules, David… …   Deutsch Wikipedia

• unit — UNÍT, Ă, uniţi, te, adj. 1. Care formează împreună un tot. 2. Care se află în raporturi strânse cu cineva, care este de acord, gândeşte, acţionează, simte la fel cu cineva; solidar cu cineva. 3. Care aparţinea unei confesiuni creştine catolice de …   Dicționar Român

• unit — [yo͞o′nit] n. [back form. (prob. modeled on DIGIT) < UNITY] 1. a) the smallest whole number; one b) a magnitude or number regarded as an undivided whole c) the number in the position just to the left of the decimal point 2 …   English World dictionary

• Unit++ — is a unit testing framework module for C++. The author started it as an alternative to CPPunit, which he felt was insufficiently integrated into the C++ language.External links* [http://unitpp.sourceforge.net/ Project s site] …   Wikipedia

• Unit — [ ju:nit] die; , s <aus gleichbed. engl. unit, rückgebildet aus unity »Einheit«, dies über das Altfranz. aus lat. unitas, vgl. ↑Unität>: 1. [Lern]einheit in Unterrichtsprogrammen. 2. fertige Einheit eines technischen Gerätes. 3. Gruppe,… …   Das große Fremdwörterbuch

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