montmorillonite Hear it!

montmorillonite definition

mont·mo·ril·lon·ite (mänt′mə ril′ə nīt′)

noun

any of a group of very soft, monoclinic clay minerals, (Na,K,etc.)AlSiO(OH)·n HO, that expand greatly in water or other liquids

Etymology: Fr, after Montmorillon, France + -ite, -ite

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

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