/ Dictionary / Index P petri-: Meaning and Definition of Find definitions for: petri- Pronunciation: [key] var. of before elements of Latin origin: petrifaction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. petrel petri dish Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language