diatomaceous earth

Variant of diatomite

diatomite definition

di·ato·mite (dī at′ə mīt′)

noun

a light-colored, soft sedimentary rock formed mainly of the siliceous shells of diatoms and used in a finely pulverized state as an abrasive, absorbent, filter, etc.
also called diatomaceous earth

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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