WordReference Random House Unabridged Dictionary of American English © 2026
hid•den•ite
(hid′n īt′),USA pronunciation n. [Mineral.]
- Mineralogy, Jewelrya rare, transparent variety of spodumene, colored yellow-green to emerald-green by chromium: used as a gem.
- see -ite1 after William English. Hidden (1853–1918), U.south, southern. mineralogist, who discovered it in 1879