Standard Lemma guide

cimetidine

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • /saɪˈmɛt.ɪ.diːn/

1

noun

Meaning 1

A histamine H2-receptor antagonist that inhibits the production of acid in the stomach, mainly used to treat heartburn and peptic ulcers, but notorious for causing male impotence. It is a histamine analog, a sulfur-containing derivative of imidazole.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: medicine, pharmacology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a drug (trade name Tagamet) used to treat peptic ulcers by decreasing the secretion of stomach acid

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: Tagamet

Antonyms: none provided

Broader terms: histamine blocker, antacid, gastric antacid, alkalizer, alkaliser, antiacid

History

Etymology

From cy(ano)- + meth- + (guan)idine.