D defs.my
Entry 1 sense Webster, 1913

Rheostat

/(rē"ō̇*stăt)/ · Rhe·o·stat · IPA /ˈɹi.ə.stæt/
01 n. A contrivance for adjusting or regulating the strength of electrical currents, operating usually by the intercalation of resistance which c…
  1. 1.
    A contrivance for adjusting or regulating the strength of electrical currents, operating usually by the intercalation of resistance which can be varied at will.(Elec.)