Hypertext Webster Gateway: "unit"

From Webster's Revised Unabridged Dictionary (1913) (web1913)

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

2. (Arith.) The least whole number; one.

Units are the integral parts of any large number.
--I. Watts.

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

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.

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

{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

{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

{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

{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},

{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.

From WordNet (r) 1.7 (wn)

n 1: any division of quantity accepted as a standard of
measurement or exchange; "the dollar is the United
States unit of currency"; "a unit of wheat is a bushel";
"change per unit volume" [syn: {unit of measurement}]
2: an individual or group or structure or other entity regarded
as a structural or functional constituent of a whole; "the
reduced the number of units and installations"; "the word
is a basic linguistic unit"
3: an organization regarded as part of a larger social group;
"the coach said the offensive unit did a good job"; "after
the battle the soldier had trouble rejoining his unit"
[syn: {social unit}]
4: a single undivided whole; "an idea is not a unit that can be
moved from one brain to another"
5: instrumentality that combines interrelated interacting
artifacts designed to work as a coherent entity; "he
bought a new stereo system"; "the unit consists of a motor
and a small computer" [syn: {system}]
6: a single undivided natural entity occurring in the
composition of something else; "units of nucleic acids"
[syn: {building block}]
7: an assemblage of parts that is regarded as a single entity;
"how big is that part compared to the whole?"; "the
repairman simply replaced the unit" [syn: {whole}, {whole

Additional Hypertext Webster Gateway Lookup

Enter word here:
Exact Approx

Gateway by dict@stokkie.net
stock only wrote the gateway and does not have any control over the contents; see the Webster Gateway FAQ, and also the Back-end/database links and credits.