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Unit The word unit
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 .
If you know any more meanings of the term 'unit' you may want to add them to this list.
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