noun Pharmacology.

a substance, C10H16N6S, that is used alone or in combination with antacids to inhibit gastric secretion in the treatment of duodenal ulcers.

Origin of cimetidine

1975–80; probably ci-, respelling of cy(ano)-3 + met(hyl) + (guan)idine Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for cimetidine



a drug used to suppress the formation of acid by the stomach and so to encourage the healing of gastric and duodenal ulcers. Formula: C 10 H 16 -N 6 S
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

cimetidine in Medicine


[sĭ-mĕtĭ-dēn′, -dīn′]


A histamine antagonist used to treat peptic ulcer and hypersecretory conditions by inhibiting gastric acid secretion.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.