argillite Hear it!

argillite definition

ar·gil·lite (är′jə līt′)

noun

a hardened mudstone showing no slatelike cleavage

Etymology: L argilla (see argillaceous) + -ite

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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