/ Dictionary / Index T tetradrachma: Meaning and Definition of Find definitions for: tet•ra•drach•ma Pronunciation: (te"tru-drak'mu), [key] — n. a silver coin of ancient Greece, equal to four drachmas. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tetrad tetradymite Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language