prōˈpaməˌdēn, -_də̇n noun
Etymology: prop ane + amidine
: an antiseptic CH 2 [CH 2 OC 6 H 4 C(−NH)NH 2 ] 2 structurally related to propane and the amidine of benzoic acid and used chiefly in surgery for inhibiting the growth of hemolytic streptococci and staphylococci