noun

rotator

rotator

The mechanic replaced the engine's rotator.

The mechanic replaced the engine's rotator.

He injured his rotator cuff playing tennis.

He injured his rotator cuff playing tennis.

((a/the)) rotator. A thing that rotates. The engine has a complex rotator.

Synonyms: spinner, rotor

From Latin 'rotare' (to turn) + '-or' (agent suffix).

Think of something that 'rotates'; the '-or' suffix often means 'a thing that does'.

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