pro·pam·i·dine \prōˈpaməˌdēn, -_də̇n\noun Etymology:propane + amidine : an antiseptic CH2[CH2OC6H4C(−NH)NH2]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