/ Dictionary / Index T tiemannite: Meaning and Definition of Find definitions for: tie•mann•ite Pronunciation: (tē'mu-nīt"), [key] — n. a mineral, mercuric selenide, HgSe, occurring in the form of a compact mass of gray crystals. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tie line Tienanmen Square Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language