Rheostat definition

rēə-stăt
A variable resistor for changing the resistance of an electrical circuit without interrupting the circuit, used as for regulating the brightness of electric lights.
noun
2
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A continuously variable electrical resistor used to regulate current.
noun
1
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An electrical resistor, with two terminals, whose resistance is continuously variable by moving a knob or slider.
noun
1
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Other Word Forms

Noun

Singular:
rheostat
Plural:
rheostats

Origin of rheostat

  • From rheo- +"Ž -stat.

    From Wiktionary