Standard Lemma guide

isoniazid

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: /ˌʌɪ.sə(ʊ)ˈnʌɪ.əz.ɪd/
  • General-American: /ˌaɪ.səˈnaɪ.əz.ɪd/

1

noun

Meaning 1

A synthetic, crystalline compound, C6H7N3O, (trademarks Hydra, Hyzyd, Isovit, Laniazid, Nydrazid, Rimifon, Stanozide) used as a bacteriostatic medication in the prevention and treatment of tuberculosis.

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

antibacterial drug (trade name Nydrazid) used to treat tuberculosis

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: INH, Nydrazid

Antonyms: none provided

Broader terms: antibacterial, antibacterial drug, bactericide

History

Etymology

Contraction of isonicotinoylhydrazide.

Across languages

Translations

17 source translations are retained for this English entry.

  • Afrikaans: isoniasied — Translations
  • Albanian: izoniazid — Translations
  • Armenian: իզոնիազիդ (izoniazid) — Translations
  • Chinese Mandarin: 異煙肼 /异烟肼 (yìyānjǐng) — Translations
  • Indonesian: isoniazid — Translations
  • Japanese: イソニアジド (isoniajido) — Translations
  • Kannada: ಐಸೊನಿಯಾಜಿಡ್ (aisoniyājiḍ) — Translations
  • Korean: 이소니아지드 (isoniajideu) — Translations
  • Malayalam: ഐസോനിയാസിഡ് (aisōniyāsiḍŭ) — Translations
  • Odia: ଆଇସୋନିଆଜିଡ (āisoniājiḍa) — Translations
  • Persian: ایزونیازید — Translations
  • Polish: izoniazyd — Translations
  • Portuguese: isoniazida — Translations
  • Spanish: isoniacida — Translations
  • Spanish: isoniazida — Translations
  • Turkish: isoniazid — Translations
  • Turkish: izoniazid — Translations