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Definition of commutator noun from the Oxford Advanced Learner's Dictionary

commutator

noun
 
/ˈkɒmjuteɪtə(r)/
 
/ˈkɑːmjuteɪtər/
(physics)
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  1. a device that connects a motor to the electricity supply
  2. a device for changing the direction in which electricity flows
See commutator in the Oxford Advanced American Dictionary
hat-trick
noun
 
 
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