/ Dictionary / Index P petroglyph: Meaning and Definition of Find definitions for: pet•ro•glyph Pronunciation: (pe'tru-glif"), [key] — n. a drawing or carving on rock, made by a member of a prehistoric people. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: petroglyph (Thesaurus) petrogenesis Petrograd Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language