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English definition of “rotator”

rotator

noun [C]     /reʊˈteɪ.tər/ US  /ˈroʊˌteɪ.t̬ər/ specialized
a muscle that helps to turn a part of the body : a rotator cuff injury Substances and structures in the body
(Definition of rotator noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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