Definitions for: Rotation


[n] the act of rotating as if on an axis; "the rotation of the dancer kept time with the music"
[n] a planned recurrent sequence (of crops or personnel etc.); "crop rotation makes a balanced demand on the fertility of the soil"; "the manager had only four starting pitchers in his rotation"
[n] a single complete turn (axial or orbital); "the plane made three rotations before it crashed"; "the revolution of the earth about the sun takes one year"
[n] (mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin



Webster (1913) Definition: 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.


Ro*ta"tion, a.
Pertaining to, or resulting from, rotation; of the nature of,
or characterized by, rotation; as, rotational velocity.

Synonyms: gyration, revolution

See Also: axial motion, axial rotation, chronological sequence, chronological succession, circumvolution, clockwise rotation, counterclockwise rotation, dextrorotation, feather, feathering, gyration, levorotation, motility, motion, move, movement, orbital motion, orbital rotation, pivot, pronation, roll, sequence, spin, spin, spiral, succession, successiveness, supination, transformation, turn, turn, turning, twirl, twist, twisting, whirl, whirling, wind, winding

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