toggle-switch

toggle switch

noun Electricity.
a switch in which a projecting knob or arm, moving through a small arc, causes the contacts to open or close an electric circuit suddenly, as commonly used in most homes.

Origin:
1920–25

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
toggle switch
 
n
1.  an electric switch having a projecting lever that is manipulated in a particular way to open or close a circuit
2.  a computer device that is used to turn a feature on or off

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