nurk, mille võrra pöördub ringliikumises oleva keha trajektoori raadius mingi aja jooksul, for a point rotating around a fixed axis, quotient of the length travelled by the point and the distance from the point to the axis, taken positive or negative according to whether the rotation is obs, angle (in units of radians, degrees, turns, etc.) through which the body rotates (revolves or spins) around a centre or axis of rotation