Hypertext Webster Gateway: "rheostat"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Rheostat \Rhe"o*stat\, n. [Gr. "rei^n + stato`s standing still.]
(Elec.)
A contrivance for adjusting or regulating the strength of
electrical currents, operating usually by the intercalation
of resistance which can be varied at will. --Wheatstone.
--{Rhe`o*stat"ic}, a.
From WordNet (r) 1.7 (wn)
rheostat
n : resistor for regulating current [syn: {variable resistor}]
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