Meaning of rheostat

rhe•o•stat

Pronunciation: (rē'u-stat"), [key]
— n. Elect.
  1. an adjustable resistor so constructed that its resistance may be changed without opening the circuit in which it is connected, thereby controlling the current in the circuit.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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