/ Dictionary / Index P petrous: Meaning and Definition of Find definitions for: pet•rous Pronunciation: (pe'trus, pē'-), [key] — adj. noting or pertaining to the hard dense portion of the temporal bone, containing the internal auditory organs; petrosal. like stone, esp. in hardness; stony; rocky. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: petrous (Thesaurus) Petrouchka* Petrozavodsk Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language