from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A white or colored crystalline mineral, a variety of willemite, in which the zinc is partly replaced by manganese.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The mineral willemite.
from the GNU version of the Collaborative International Dictionary of English
- n. Willemite.
from The Century Dictionary and Cyclopedia
- n. A transition form between austenite and pearlite, in steel. See sorbite, 2.
- n. A variety of the zinc silicate willemite, occurring in hexagonal crystals of a reddish color. It contains considerable manganese.
After Gerard Troost (1776-1850), Dutch-born American geologist.(American Heritage® Dictionary of the English Language, Fourth Edition)
Troost + -ite, after Dr. Gerard Troost of Nashville, Tennessee, USA. (Wiktionary)