# rotation

EN
WRotation
• A rotation is a circular movement of an object around a center (or point) of rotation. A three-dimensional object always rotates around an imaginary line called a rotation axis.
FR rotation

## Definition of rotation in English Dictionary

• NounSUF-ation
1. (chiefly uncountable) The act of turning around a centre or an axis.
1. 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.
2. A single complete cycle around a centre or an axis.
1. Earth's moon completes a rotation every twenty-seven days or so.
3. A regular variation in a sequence.
1. crop rotation
2. The medical resident finished a two-week rotation in pediatrics and began one in orthopaedics.
4. (mathematics) An operation that a continuous isometry deformation that fixes at least one point can result in.
1. The function mapping (x,y) to (−y,x) is a rotation.
5. (baseball) The set of starting pitchers of a team.
1. (aviation) The step during takeoff when the pilot commands the vehicle to lift the nose wheel off the ground during the takeoff roll.
2. More Examples
1. Used in the Middle of Sentence
• Polar wander can be used to measure the degree to which Earth's magnetic poles have been observed to move relative to the Earth's rotation axis.
• A recent suggestion that vector potentials in electrodynamics (ED) are nontensorial objects under 4D frame rotations is found to be both unnecessary and confusing.
• Mental rotation task performance results suggest that the ELF MF exposure studied here (60 Hz, 3000 μT) modulates associated neuroprocessing, although the behavioural outcome is not altered.
2. Used in the Ending of Sentence
• It consists in a phosphorely in which phosphorylation of CheY by CheA results in the interaction of CheY with the flagellar rotor and changes in flagella rotation.
• Part-of-Speech Hierarchy
1. Nouns
• Countable nouns
• Singularia tantum
• Uncountable nouns
1. fr rotation
2. en rotations
3. fr rotations
4. en rotational
5. fr rotationnel
Source: Wiktionary
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## Meaning of rotation for the defined word.

Grammatically, this word "rotation" is a noun, more specifically, a countable noun and a singularia tantum.
Difficultness: Level 3
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Easy     ➨     Difficult
Definiteness: Level 7
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Definite    ➨     Versatile