WordReference Random House Unabridged Dictionary of American English © 2025
tie•mann•ite
(tē′mə nīt′),USA pronunciation n.
- Mineralogya mineral, mercuric selenide, HgSe, occurring in the form of a compact mass of gray crystals.
- German Tiemannit (1855), after west, western. Tiemann, German scientist who found it; see -ite1