a slaty rock, the cleavage planes of which have a luster imparted by minute scales of mica.
- phyl·lit·ic [fi-lit-ik], /fɪˈlɪt ɪk/, adjective
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How to use phyllite in a sentence
Geologically, the Erzgebirge range consists mainly of gneiss, mica and phyllite.
At Otter Lake a much foliated and weathered phyllite was found.The Long Labrador Trail | Dillon Wallace
British Dictionary definitions for phyllite
a compact lustrous metamorphic rock, rich in mica, derived from a shale or other clay-rich rock
- phyllitic (fɪˈlɪtɪk), adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for phyllite
A green, gray, or red metamorphic rock, similar to slate but often having a wavy surface and a distinctive luster imparted by the presence of mica.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.