Definition of rotation in English:

rotation

Syllabification: ro·ta·tion
Pronunciation: /rōˈtāSHən
 
/

noun

  • 1The action of rotating around an axis or center: the moon moves in the same direction as the earth’s rotation
    More example sentences
    • With the motion and rotation of Earth, the coordinates dance all around in a strange mess that is extremely difficult to untangle.
    • The earth moves around the sun in an orbit that is nearly a circle, and the axis of rotation of the earth maintains an effectively fixed direction.
    • Its chambers and tunnel will allow visitors to perceive the earth's rotation and its changing alignments with the stars.
    Synonyms
    revolving, turning, spinning, gyration, circlingturn, revolution, orbit, spin
  • 1.1 (also crop rotation) The action or system of rotating crops.
    More example sentences
    • He uses cow manure, green manure and crop rotation to ensure nutrient-rich soil for his rapeseed crop.
    • It appears that factors of fall moisture, winter exposure, leaf diseases, and early summer heat are larger than crop rotation and or tillage method.
    • Disease-resistant varieties, crop rotation, and tillage are especially important in management of wheat diseases.
  • 1.2 Forestry The cycle of growth and felling or cutting of trees.
    More example sentences
    • If the forest has a non-timber value, for instance, in terms of its recreation value or its value as a wildlife habitat, then this changes the socially optimal forest rotation.
    • Initial growth rates can be improved for higher assurance of success and shorter rotations.
    • The region also plays host to a large number of birches to add variety, a component that forest management plans aim to maintain past the current rotation.
  • 1.3The passing of a privilege or responsibility from one member of a group to another in a regularly recurring succession: it has become common for senior academics to act as heads of department in rotation
    More example sentences
    • Gurkha battalions have been stationed there in rotation for the past twenty-five years.
    • Their substantial independence threatened republican tradition with its corporate government and brief periods of high office for individuals in rotation.
    • There are occasions where there are two Bards sharing the telling in rotation, enabling an even more embellished tale to be told.
    Synonyms
    sequence, succession; alternation, cycle
  • 1.4US A tour of duty, especially by a medical practitioner in training: she was completing a rotation in trauma surgery
    More example sentences
    • They focus on core programs in analytics, and then have a very experiential period - similar to the clinical rotations used in other professions.
    • Kate told Stephen how she got on the accelerated Medicine program at Boston University and that all of her rotations would transfer over to UIC except the ER.
    • Classroom training is then combined with hands-on experience that includes a general rotation in every department of the company.
  • 1.5 Mathematics The conceptual operation of turning a system around an axis.
  • 1.6 Mathematics another term for curl ( sense 2 of the noun).

Derivatives

rotational

adjective
More example sentences
  • The number of bumps on each wheel in combination with the rotational speed determined the pitch produced by a particular tone wheel assembly.
  • And my brother and I had put her in front of the rotational sprinkler too many times.
  • Be sure to place stations in different parts of the field (areas with different rotational histories, soil types, low or high spots, etc.) to obtain a representative sample.

rotationally

Pronunciation: /-SHənl-ē/
adverb
More example sentences
  • If grown with tall-growing grasses and grazed rotationally, the pastures should be grazed at relatively short intervals to prevent excessive shading by the grass.
  • With rotationally deploying ships from both the Atlantic and Pacific Fleets, 5th Fleet typically has more than a dozen ships and 15,000 to 20,000 Sailors and Marines.
  • The lower eye is rotationally symmetrical, but the upper eye is only bilaterally symmetrical (front view shown to the right).

Origin

mid 16th century: from Latin rotatio(n-), from the verb rotare (see rotate).

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