1550s, from Latin rotationem (nominative rotatio) "a turning about in a circle," noun of action from past participle stem of rotare "turn round, revolve, whirl about, roll," from PIE *ret- "to run, roll" (see rotary).
the rotation of the dancer kept time with the music
the plane made three rotations before it crashed
crop rotation makes a balanced demand on the fertility of the soil
the manager had only four starting pitchers in his rotation
rostrum
rosy
rot
rotary
rotate
rotation
rotational
rotavirus
rote
rotgut
Rothschild
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