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the act of rotating; a turning around as on an axis.

the movement or path of the earth or a heavenly body turning on its axis.
one complete turn of such a body.

regularly recurring succession, as of officials.
Agriculture. crop rotation.

an operation that rotates a geometric figure about a fixed point.
curl (def 14).

Pool. a game in which the balls are played in order by number.
Baseball. pitching rotation.
the act of rotating; rotary motion
a regular cycle of events in a set order or sequence
a planned sequence of cropping according to which the crops grown in successive seasons on the same land are varied so as to make a balanced demand on its resources of fertility

a circular motion of a configuration about a given point or line, without a change in shape
a transformation in which the coordinate axes are rotated by a fixed angle about the origin
another name for curl (sense 11) Abbreviation (for sense 4c) rot


the spinning motion of a body, such as a planet, about an internal axis Compare revolution (sense 5a)
one complete turn in such motion

rotation ro·ta·tion (rō-tā’shən)

The act or process of turning around a center or an axis.

Regular and uniform variation in a sequence or series, as in the recurrence of symptoms of a disease.


The motion of an object around an internal axis.

A single complete cycle of such motion. See Note at revolution.

A transformation of a coordinate system in which the new axes have a specified angular displacement from their original position while the origin remains fixed.


Read Also:

  • Rotational-molding

    noun 1. a method for molding hollow plastic objects by placing finely divided particles in a hollow mold that is rotated about two axes, exposing it to heat and then to cold.

  • Rotational nystagmus

    rotational nystagmus ro·ta·tion·al nystagmus (rō-tā’shə-nəl) n. A jerky nystagmus arising from stimulation of the labyrinth of the ear by rotation of the head around any axis and induced by change of motion.

  • Rotational-quantum-number

    noun, Physics. 1. the quantum number that distinguishes the angular momentum states associated with the rotational motion of a molecule.

  • Rotation-axes

    noun, Crystallography. 1. an imaginary line through a crystal about which the crystal may be rotated a specified number of degrees and be brought back to its original position. rotation of axes [ak-seez] /ˈæk siz/ noun, Mathematics. 1. a process of replacing the axes in a Cartesian coordinate system with a new set of axes […]

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