/ Dictionary / Index I isosorbide dinitrate: Meaning and Definition of Find definitions for: i•so•sor•bide di•ni•trate Pronunciation: (ī"su-sôr'bīd dī-nī'trāt, -sōr'-), [key] — Pharm. Pharm. a coronary vasodilator, CHNO, used in the prophylaxis and treatment of angina. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isosmotic isospin Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language