/ Dictionary / Index P porphyry: Meaning and Definition of Find definitions for: por•phy•ry Pronunciation: (pôr'fu-rē), [key] — pl. -ries. a very hard rock, anciently quarried in Egypt, having a dark, purplish-red groundmass containing small crystals of feldspar. any igneous rock containing coarse crystals, as phenocrysts, in a finer-grained groundmass. Por•phy•ry Pronunciation: (pôr'fu-rē), [key] — n. a.d.c233–c304, Greek philosopher. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: porphyry (Thesaurus) porphyroid porpoise Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language