Standard Lemma guide

ranitidine

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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  • Received-Pronunciation: /ɹaˈnɪt.ɪ.diːn/
  • Received-Pronunciation: /ɹaˈnʌɪ.tɪ.diːn/
  • General-American: /ɹəˈnɪt.ɪˌdin/

1

noun

Meaning 1

A furan (trademark Zantac) which blocks the histamine H2-receptors, to prevent the secretion of gastric acid.

Definition source: English Wiktionary via Wiktextract

Usage: 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 histamine blocker and antacid (trade name Zantac) used to treat peptic ulcers and gastritis and esophageal reflux

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: Zantac

Antonyms: none provided

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

History

Etymology

Etymology tree English (fu)ran(yl) Egyptian nṯr Proto-Afroasiatic *-i? Egyptian -j Egyptian nṯrjder. Semiticbor. Ancient Greek νῐ́τρον (nĭ́tron) English ni(tro)- English -tidine English ranitidine From (fu)ran(yl) + ni(tro)- + -tidine.