Rotation \Ro*ta"tion\, n. [L. rotatio: cf. F. rotation.]
1. The act of turning, as a wheel or a solid body on its
axis, as distinguished from the progressive motion of a
revolving round another body or a distant point; thus, the
daily turning of the earth on its axis is a rotation; its
annual motion round the sun is a revolution.
2. Any return or succesion in a series.
Moment of rotation. See Moment of inertia, under
Moment.
Rotation in office, the practice of changing public
officers at frequent intervals by discharges and
substitutions.
Rotation of crops, the practices of cultivating an orderly
succession of different crops on the same land.
Source: Webster's Revised Unabridged Dictionary (1913)
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