/ Dictionary / Index D diltiazem: Meaning and Definition of Find definitions for: dil•ti•a•zem Pronunciation: (dil-tī'u-zem"), [key] — n. Pharm. a white to whitish crystalline powder, CHNOS, used as a calcium blocker in the treatment of angina pectoris. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: diltiazem (Thesaurus) dillydally diluent 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