Unit
Unit
Ultrasound
The word unit means any of several things:- In mathematics:
- Unit vector, a vector with length 1.
- Unit circle, the circle with radius 1 centered at the origin.
- Unit interval, the interval of all real numbers between 0 and 1.
- Imaginary unit, i, whose square is -1.
- Root of unity, a complex number, a power of which is 1.
- Unit (ring theory), an element that is invertible with respect to ring multiplication.
- In Category theory, there is a Natural transformation called the unit from the identity Functor to the composition of two Adjoint functors, q.v.