rotation

[roh-tey-shuh n] /roʊˈteɪ ʃən/
noun
1.
the act of rotating; a turning around as on an axis.
2.
Astronomy.
  1. the movement or path of the earth or a heavenly body turning on its axis.
  2. one complete turn of such a body.
3.
regularly recurring succession, as of officials.
4.
Agriculture, crop rotation.
5.
Mathematics.
  1. an operation that rotates a geometric figure about a fixed point.
  2. curl (def 17).
6.
Pool. a game in which the balls are played in order by number.
7.
Baseball. pitching rotation.
Origin
1545-55; < Latin rotātiōn- (stem of rotātiō) a rotation, rolling, equivalent to rotāt(us) (see rotate1) + -iōn- -ion
Related forms
rotational, adjective
nonrotation, noun
nonrotational, adjective
unrotational, adjective
Examples from the web for rotation
  • In empire, there was an alternative: incompetent rulers could be removed, and there was a rotation of people.
  • Similarly, her rotation slows when she extends her arms at the conclusion of the spin.
  • When the moon is farther away, the axis rotation kind of gets behind the moon's orbital motion.
  • When a pitcher throws a knuckleball, the ball has no rotation and appears to flutter.
  • Convention puts the angular velocity vector along the axis of rotation.
  • The first is that caused directly by the spoon: the rotation of the tea around a vertical axis at the centre of the cup.
  • They propose instead that its rotation slowed to a standstill and then reversed direction.
  • Note that this moment of inertia calculation depends on the location of the axis of rotation.
  • Though the rotation takes only a few seconds, the overall image will be blurred if the patient moves.
  • It seemed to me that there must be some fundamental misconception involved in this galaxy rotation problem.
British Dictionary definitions for rotation

rotation

/rəʊˈteɪʃən/
noun
1.
the act of rotating; rotary motion
2.
a regular cycle of events in a set order or sequence
3.
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
4.
(maths)
  1. a circular motion of a configuration about a given point or line, without a change in shape
  2. a transformation in which the coordinate axes are rotated by a fixed angle about the origin
  3. another name for curl (sense 11) Abbreviation (for sense 4c) rot
5.
  1. the spinning motion of a body, such as a planet, about an internal axis Compare revolution (sense 5a)
  2. one complete turn in such motion
Derived Forms
rotational, adjective
Word Origin and History for rotation
n.

1550s, 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 PIE *roto- (see rotary).

rotation in Medicine

rotation ro·ta·tion (rō-tā'shən)
n.

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

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

rotation in Science
rotation
  (rō-tā'shən)   

  1. The motion of an object around an internal axis.

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

  3. 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.