/ Dictionary / Index P petrosal: Meaning and Definition of Find definitions for: pe•tro•sal Pronunciation: (pi-trō'sul), [key] — adj. petrous; hard. of or pertaining to the petrous portion of the temporal bone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. petropower Petrouchka* 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