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contactor

[kon-tak-ter, kuh n-tak-ter]
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noun Electricity.
  1. a mechanically operated switch for continuously establishing and interrupting an electric power circuit.
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Origin of contactor

First recorded in 1905–10; contact + -or2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for contactor

contactor

noun
  1. a type of switch for repeatedly opening and closing an electric circuit. Its operation can be mechanical, electromagnetic, or pneumatic
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012