/ Dictionary / Index P propranolol: Meaning and Definition of Find definitions for: pro•pran•o•lol Pronunciation: (prō-pran'u-lôl", -lol"), [key] — n. Pharm. a beta-blocking drug, CHNO, used in the treatment of hypertension, angina pectoris, and cardiac arrhythmias. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. propraetor proprietary Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language