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rheostat

(-stat′)

noun

a variable resistor for changing the resistance of an electrical circuit without interrupting the circuit, used as for regulating the brightness of electric lights

Origin: rheo- + -stat

Related Forms:

rheostatic adjective

See rheostat in American Heritage Dictionary 4

noun

A continuously variable electrical resistor used to regulate current.

Related Forms:

rheˌo·statˈic adjective

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