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 observed to be in the counterclockwise sense or the clockwise sense, respectively, for an observer looking in the direction opposite to the direction of the axis, angle (in units of radians, degrees, turns, etc.) through which the body rotates (revolves or spins) around a centre or axis of rotation