/ Dictionary / Index P phyllite: Meaning and Definition of Find definitions for: phyl•lite Pronunciation: (fil'īt), [key] — n. a slaty rock, the cleavage planes of which have a luster imparted by minute scales of mica. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Phyllis phyllo Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language