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English definition of “commutator”

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commutator

noun [C] uk   /ˈkɒm.jʊ.teɪ.tər/ us    /ˈkɑː.mjə.teɪ.t̬ɚ/ specialized
a device used in some types of electric motors to change the direction in which an electric current is flowing
(Definition of commutator from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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