isoniazid
/ˌaɪ.səˈnaɪ.əz.ɪd/noun
isoniazid is spelled I-S-O-N-I-A-Z-I-D: 9 letters and 5 syllables. It appears about once in every 11 million words in written English, the 98,107th most frequent word form (wordfreq, 2021 data). As a noun, isoniazid means “A synthetic, crystalline compound, C₆H₇N₃O, (trademarks Hydra, Hyzyd, Isovit, Laniazid, Nydrazid, Rimifon, Stanozide) used as a bacteriostatic…” (English Wiktionary, September 2026). The plural of isoniazid is isoniazids.
How many letters and syllables are in isoniazid?
| Letters | 9: I-S-O-N-I-A-Z-I-D |
|---|---|
| Syllables | 5 (from its pronunciation) |
| In writing | about once in every 11 million words; the 98,107th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is isoniazid?
Isoniazid appears about once in every 11 million words in written English, the 98,107th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce isoniazid?
- UK /ˌʌɪ.sə(ʊ)ˈnʌɪ.əz.ɪd/
- US /ˌaɪ.səˈnaɪ.əz.ɪd/
Isoniazid has 5 syllables (counted from the pronunciation).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of isoniazid
- isoniazids plural
- isonicotinylhydrazide
- retozide
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does isoniazid mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 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.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Isoniazid in Spanish, French, German and Portuguese
In the sense Translations:
| Language | Words |
|---|---|
| Portuguese | isoniazida |
| Spanish | isoniacida, isoniazida |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does isoniazid come from?
Contraction of isonicotinoylhydrazide.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).