Unit

Look up unit in Wiktionary, the free dictionary.

Unit may refer to:

Science, technology, and medicine

Unit of measurement, a definite magnitude of a physical quantity, defined and adopted by convention or by law
Astronomical unit, a unit of length roughly between the Earth and the Sun
Blood unit, a measurement in blood transfusion
English units, a historical units of measurement used in England up to 1824
Enzyme unit, a measurement of active enzyme in a sample
Equivalent (chemistry), a unit of measurement used in chemistry and biology
Geological unit or rock unit, a volume of identifiable rock or ice
GNU Units, a software program for unit conversion
International unit, a unit of measurement for nutrients and drugs
International System of Units (SI), modern form of the metric system
Natural unit, a physical unit of measurement
Statistical unit, a data point on which statistical analysis is performed
Unit testing, a method by which individual units of source code
Unit, a vessel or section of a chemical plant
Central processing unit, the electronic circuitry within a computer that carries out the instructions of a computer program

Identity element
Unit number, the number 1
Unit (ring theory), an element that is invertible with respect to ring multiplication
Unit round-off, an upper bound on the relative error due to rounding in floating point arithmetic
Unit angle, a full turn equal to an angle of 1
Unit circle, a circle with a radius of length 1
Unit cube, a cube with sides of length 1
Unit fraction, a reciprocal of a positive integer
Unit imaginary number, square root of negative 1 $({\sqrt {-1}})$
Unit impulse, an impulse of height 1
Unit interval, an interval of distance 1
Unit matrix, a diagonal matrix such that all elements on the main diagonal are 1
Unit set, a singleton, a set with exactly 1 element
Unit sphere, a sphere with a radius of length 1
Unit square, a square with sides of length 1
Unit type, a type allowing only one value in type theory
Unit vector, a vector with length equal to 1
A tuple of length 0; an empty tuple

UNIT, a fictional military organization in the science fiction television series Doctor Who
The Unit, an American television series
Unit of action, a discrete piece of action (or beat) in a theatrical presentation

Unit (housing), a self-contained suite of rooms within a set of similar dwellings
Unit of account, a monetary unit of measurement
Unit of alcohol, a measure of the volume of pure ethanol in an alcoholic beverage
Active service unit, the former Provisional Irish Republican Army cell
Head unit, a component of a stereo system mounted inside of a vehicle
Military unit, a homogeneous military organization whose administrative and command functions are self-contained
Multiple unit, self-propelled train carriage capable of coupling other units of the same type
Strategic business unit, a profit center which focuses on product offering and market segment
Work unit, the name given to a place of employment in the People's Republic of China
A course credit at a school or other educational institution