ro·ta·tion 
(rō-tāshən)
(rō-tāshən)n.
1.
a. The act or process of turning around a center or an axis: the axial rotation of the earth.
b. A single complete cycle of such motion.
2. Mathematics A transformation of a coordinate system in which the new axes have a specified angular displacement from their original position while the origin remains fixed.
3. Regular and uniform variation in a sequence or series: a rotation of personnel; crop rotation.
4. Baseball
a. The sequence in which the starting pitchers on a team pitch in games.
b. The pitchers used in such a sequence: a team with an excellent rotation.
ro·tation·al adj.
- on (one's) soapbox
- on one's soapbox
- on (one's)/the way
- on (one's) /the way
- on one's the way
- on (one's) toes
- on one's toes
- on (one's) uppers
- on one's uppers
- on one's way
- on one/the onehand
- on order
- on own
- on own account
- on own ground
- on own hook
- on own initiative
- on pain of
- on paper
- on pins and needles
- on principle
- on purpose
- on radar screen
- on radar screen
- on record