An operation performed on data in a register of the central processing unit, in which all the bits in the register are shifted one position to the right or left, and the endmost bit, which is shifted out of the register, is carried around to the position at the opposite end of the register.

See <<curl>>

1. Also known as rotational motion.

2. Motion of a rigid body in which either one point is fixed, or all the points on a straight line are fixed.

3. Angular displacement of a rigid body.

4. The motion of a particle about a fixed point.