/ Dictionary / Index P par. aff.: Meaning and Definition of Find definitions for: par. aff. Pronunciation: [key] (in prescriptions) to the part affected. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. paraesthesia paraffin Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language