commutator

UK:^*^*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈkɒmjʊˌteɪtə/US:USA pronunciation: respellingUSA pronunciation: respelling(kom′yə tā′tər)

com•mu•ta•tor (kom′yə tā′tər),USA pronunciation n.

Electricity
- a device for reversing the direction of a current.
- (in a DC motor or generator) a cylindrical ring or disk assembly of conducting members, individually insulated in a supporting structure with an exposed surface for contact with current-collecting brushes and mounted on the armature shaft, for changing the frequency or direction of the current in the armature windings.
Mathematicsthe element equal to the product of two given elements in a group multiplied on the right by the product of the inverses of the elements.

commutate + -or² 1830–40

Collins Concise English Dictionary © HarperCollins Publishers::

commutator /ˈkɒmjʊˌteɪtə/ n

a device used to reverse the direction of flow of an electric current
the segmented metal cylinder or disc mounted on the armature shaft of an electric motor, generator, etc, used to make electrical contact with the rotating coils and ensure unidirectional current flow

'commutator' also found in these entries (note: many are not synonyms or translations):

commutate - commutator group - series-wound - synchronous converter

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⇱ commutator - WordReference.com Dictionary of English

commutator