rotation

noun

1. the act of rotating as if on an axis"the rotation of the dancer kept time with the music"
2. (mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin
3. a single complete turn (axial or orbital)"the plane made three rotations before it crashed"
4. a planned recurrent sequence (of crops or personnel etc.)"crop rotation makes a balanced demand on the fertility of the soil"