Tetradrachm
Tetradrachm , noun
[New Latin tetradrachma, from Greek tetra`drachmon; te`tra- (see Tetra-) + drachmh` drachm, drachma.]
The Attic tetradrachm was equal to 3s. 3d. sterling, or about 76 cents.
A silver coin among the ancient Greeks, of the value of four drachms.
Also: Tetradrachma