\Tet"ra*drachm\, Tetradrachma \Tet`ra*drach"ma\, 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.
Note: The Attic tetradrachm was equal to 3s. 3d. sterling, or
      about 76 cents.