Unit
The word
unit can mean more than one thing:
- One, the first natural number.
- The natural or usual or smallest measure of something, of which there are multiples and of which there may be fractions.
- In most physical contexts, for example science and engineering, 'unit' is used to mean a physical unit of measurement of a quantity. Systems of units are formed which are typically characterized by the units chosen for mass, distance, and time. Such systems of units include
- A currency is a unit of money (a monetary unit).
- In mathematics, "unit" often refers to the number one in some sense:
- A unit vector is a vector with length 1.
- The unit circle is the cirle with radius 1 centered at the origin of the coordinate system.
- The unit interval is the interval of all real numbers between 0 and 1.
- The imaginary unit of complex numbers is the number i, a number whose square is -1.
- A root of unity is a complex number a power of which is 1.
- A unit of a ring is an element of the ring that is invertible with respect to the ring multiplication.
- Military units:
- Unit 101 was an Israeli special operations unit.
- Unit 731 was a secret military unit of the Japanese army.
- Functional units are components of a system that perform a specific function:
- A multiple unit is a passenger train whose carriages have their own motors.
- In the science fiction television series, "Doctor Who", the initials UNIT stand for the United Nations Intelligence Taskforce.
This is a disambiguation page; that is, one that points to other pages that might otherwise have the same name. If you followed a link here, you might want to go back and fix that link to point to the appropriate specific page.
If you know any more meanings of the term 'unit' you may want to add them to this list.
