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Definition of commutator noun from the Oxford Advanced American Dictionary

     

    commutator

     noun
    noun
    NAmE//ˈkɑmyəˌteɪt̮ər//
     
    (physics)
     
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  1. 1a device that connects a motor to the electricity supply
  2. 2a device for changing the direction in which electricity flows
See the Oxford Advanced Learner's Dictionary entry: commutator