angular speed

(mechanics) Change of direction per unit time, as of a target on a radar screen, without regard to the direction of the rotation axis; in other words, the magnitude of the angular velocity vector. Also known as angular rate.

A measure of how fast a rotating body is changing its angular position. The average angular speed (w) is obtained by dividing the angular distance through which the body rotates by the time taken: w = θ/t, where θ = angular distance, and t = time taken in seconds.