Source : Webster's Revised Unabridged Dictionary (1913)

Bimetallic \Bi"me*tal"lic\, a.
   Composed of two different metals; formed of two parts, each
   of a different metal; as, bimetallic wire; bimetallic
   thermometer, etc.

Bimetallic \Bi`me*tal"lic\, a. [Pref. bi- + metallic: cf. F.
   bim['e]tallique.]
   Of or relating to, or using, a double metallic standard (as
   gold and silver) for a system of coins or currency.

Source : WordNet®

bimetallic
     adj 1: pertaining to a monetary system based on two metals; "in a
            bimetallistic system both gold and silver can
            constitute legal tender" [syn: {bimetallistic}]
     2: formed of two different metals or alloys; especially in
        sheets bonded together [syn: {bimetal}]