tetrāchmum ī, n
, τετρᾶχμον, a Grecian silver coin of four drachmas, four-drachma piece: Atticorum, L.: tetrachmūm Atticūm (genit.), L.
tē̆trachmum, v. tetradrachmum. ...
A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.