from
The Collaborative International Dictionary of English v.0.48
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.
[1913 Webster]
2. Any return or succesion in a series.
[1913 Webster]
{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.
[1913 Webster]