Rheostatnoun
An electrical resistor, with two terminals, whose resistance is continuously variable by moving a knob or slider.
Dimmernoun
A rheostat that is used to vary the intensity of a domestic electric light
Rheostatnoun
A contrivance for adjusting or regulating the strength of electrical currents, operating usually by the intercalation of resistance which can be varied at will.
Dimmernoun
A switch used to select between the low and high headlamp beam on a road vehicle. (usually as "dimmer switch", primarily in North America; elsewhere "dipswitch" or "dipper switch")
Rheostatnoun
resistor for regulating current
Dimmernoun
a rheostat that varies the current through an electric light in order to control the level of illumination
Rheostatnoun
an electrical instrument used to control a current by varying the resistance.
Dimmernoun
a device for varying the brightness of an electric light.
Dimmernoun
a headlight with a low beam.
Dimmernoun
small parking lights on a motor vehicle.
Dimmer
Dimmers are devices connected to a light fixture and used to lower the brightness of light. By changing the voltage waveform applied to the lamp, it is possible to lower the intensity of the light output.