rotation

Borrowed from Latin rotatiō. By surface analysis, rotate +‎ -ion.

• (General American) IPA^(key): /ɹoʊˈteɪʃən/

• Audio (Southern England):

  (file)

• Rhymes: -eɪʃən

rotation (countable and uncountable, plural rotations)

1. (chiefly uncountable) The act of turning around a centre or an axis.
   • 2013 March, Frank Fish, George Lauder, “Not Just Going with the Flow”, in American Scientist‎^[1], volume 101, number 2, archived from the original on 1 May 2013, page 114:

     An extreme version of vorticity is a vortex. The vortex is a spinning, cyclonic mass of fluid, which can be observed in the rotation of water going down a drain, as well as in smoke rings, tornados and hurricanes.

   The earth's rotation about its axis is responsible for its being slightly oblate rather than a sphere.

2. A single complete cycle around a centre or an axis.

   Earth's moon completes a rotation every twenty-seven days or so.

3. A regular variation in a sequence, such as to even out wear, or people taking turns in a task; a duty roster.

   Applying crop rotation to a field avoids depleting soil nutrients the way repeated use of a single crop might do.

   In rotation, each member of the group would be responsible for the beacon fire.

   The medical resident finished a two-week rotation in pediatrics and began one in orthopaedics.

4. (mathematics, geometry) An operation on a metric space that is a continuous isometry and fixes at least one point.

   The function mapping (x,y) to (−y,x) is a rotation.

5. (baseball) The set of starting pitchers of a team.
6. (aviation) The step during takeoff when the pilot commands the vehicle to lift the nose wheel off the ground during the takeoff roll. (see also: V2)
7. Repeated play on a radio station, etc.

   The new single enjoyed heavy rotation on MTV.

• turning
• revolution
• rota, roster, duty roster, schedule, turn, turn and turn about, cycling

• (mathematics): isometry, transformation

• axis

• Rotation on Wikipedia.Wikipedia

Borrowed from Latin rotātiōnem.

• IPA^(key): /ʁɔ.ta.sjɔ̃/

• Audio:

  (file)

rotation f (plural rotations)

1. rotation

• axe de rotation

• rouer, rôder

• → Romanian: rotație
• → Turkish: rotasyon

• “rotation”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

Borrowed from Latin rotatio.

rotation c

1. act of turning a physical object or a coordinate system around a center or an axis