/ Dictionary / Index I isoproterenol: Meaning and Definition of Find definitions for: i•so•pro•ter•e•nol Pronunciation: (ī"su-prō-ter'u-nôl", -nol"), [key] — n. Pharm. a beta-adrenergic receptor agonist, CHNO, used as a bronchodilator. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: isoproterenol (Thesaurus) isopropyl meprobamate isopterous Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language