numismatics |ˌˈn(j)uməzˌmødɪks| |ˌˈn(j)uməsˌmødɪks| plural noun [usu. treated as sing. ] the study or collection of coins, paper currency, and medals. DERIVATIVES numismatist |n(j)uˌmɪzmədəst| |n(j)uˌmɪsmədəst| noun