Standard Lemma guide

quinidine

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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  • /ˈkwɪn.ɪ.diːn/

1

noun

Meaning 1

A compound obtained from cinchona bark and used to treat irregularities of heart rhythm. It is an isomer of quinine.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: chemistry, medicine, natural-sciences, organic-chemistry, pharmacology, physical-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

cardiac drug (trade names Quinidex and Quinora) used to treat certain heart arrhythmias

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: Quinidex, Quinora

Antonyms: none provided

Broader terms: antiarrhythmic, antiarrhythmic drug, antiarrhythmic medication

History

Etymology

From Spanish quina + -idine.

Across languages

Translations

6 source translations are retained for this English entry.

  • Catalan: quinidina — isomer of quinine
  • Chinese Mandarin: 奎尼丁 (kuínídīng) — isomer of quinine
  • French: quinidine — isomer of quinine
  • German: Chinidin — isomer of quinine
  • Italian: chinidina — isomer of quinine
  • Spanish: quinidina — isomer of quinine