/ Dictionary / Index T tetradymite: Meaning and Definition of Find definitions for: te•trad•y•mite Pronunciation: (te-trad'u-mīt"), [key] — n. a mineral, bismuth telluride and sulfide, BiTeS, occurring in soft-gray to black foliated masses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tetradrachma tetradynamous 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