{ ‖ } n. [ NL. tetradrachma, fr. Gr. tetra`drachmon; te`tra- (see Tetra-) + drachmh` drachm, drachma. ] A silver coin among the ancient Greeks, of the value of four drachms. The Attic tetradrachm was equal to 3s. 3d. sterling, or about 76 cents. [ 1913 Webster ]