sillimanite Hear it!

sillimanite definition

☆ sil·li·man·ite (sil′ə mə nīt′)

noun

a very hard, mineral, aluminum silicate, AlSiO, usually found in metamorphic rock as long, slender crystals of various colors

Etymology: after B. Silliman (1779-1864), U.S. chemist and geologist + -ite

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.