ROTATION

rotation. Rotation, n. a whirling round, course, turn

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Ro‐ta″tion (?), n. [[L. rotatio: cf. F. rotation.]] 1. 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. 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.