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Related to phyllite: amphibolite
A green, gray, or red metamorphic rock, similar to slate but often having a wavy surface and a distinctive micaceous luster.
phyl·lit′ic (fĭ-lĭt′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Geological Science) a compact lustrous metamorphic rock, rich in mica, derived from a shale or other clay-rich rock
[C19: from phyll(o)- + -ite1]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a slaty rock, the cleavage planes of which have a luster imparted by minute scales of mica.
[1820–30; < Greek phýll(on) leaf + -ite1]
phyl•lit•ic (fɪˈlɪt ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.