phyllite Hear it!

phyllite definition

phyl·lite (fil′īt′)

noun

a type of metamorphic rock having tiny mica grains that give it a luster: it is intermediate in crystal development between slate and schist

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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