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commutator
com·mu·ta·tor [ kómmyə tàytər ] (plural com·mu·ta·tors)


noun 
Definition:
 
control for electric current flow: a device that maintains the direction of flow of electric current in a generator or reverses it in an electric motor
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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