Etymology
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rotation (n.)

1550s, "act of rotating or turning, action of moving round a center," 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 the same source as rota "wheel" (see rotary).

Sense of "a recurring series or period" is by 1610s. Used earlier in alchemy, "transmutation of the four elements into one another" (late 15c.).

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Definitions of rotation

rotation (n.)
the act of rotating as if on an axis;
the rotation of the dancer kept time with the music
Synonyms: rotary motion
rotation (n.)
(mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin;
rotation (n.)
a single complete turn (axial or orbital);
the plane made three rotations before it crashed
Synonyms: revolution / gyration
rotation (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
From wordnet.princeton.edu

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