/ Dictionary / Index C cimetidine: Meaning and Definition of Find definitions for: ci•met•i•dine Pronunciation: (su-met'i-dēn"), [key] — n. Pharm. a substance, CHNS, that is used alone or in combination with antacids to inhibit gastric secretion in the treatment of duodenal ulcers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cimetidine (Thesaurus) cimeliarch cimex Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language