Tět'ra-drăchm or Tět'ra-drăch'mă, n.

(-dram), Tět'ra-drăch'mă (-drăk'mă), n. [Gr. τετράδραχμον, from τέτρα, four, and δραχμή, drachm, drachma; Fr. tétradrachme.] (Anc. Coinage.) A silver coin worth four drachmas. The Attic tetradrachm was equal to 3s. 3d. sterling, or about 79 cents.