Phrase guide

nitrous acid

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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1

noun

Meaning 1

A weak acid, HNO2, known only in solution, or as its salts and esters, the nitrites; it has a linear structure, H-O-N=O

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Topics: chemistry, inorganic-chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

an unstable inorganic acid known only in solution and as nitrite salts

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: acid

History

Etymology

No etymology was provided for this word.

Across languages

Translations

18 source translations are retained for this English entry.

  • Catalan: àcid nitrós — weak acid, HNO2
  • Chinese Mandarin: 亞硝酸 /亚硝酸 (yàxiāosuān) — weak acid, HNO2
  • Czech: kyselina dusitá — weak acid, HNO2
  • Danish: salpetersyrling — weak acid, HNO2
  • Esperanto: nitrita acido — weak acid, HNO2
  • Faroese: salpetursýrlingur — weak acid, HNO2
  • French: acide nitreux — weak acid, HNO2
  • German: salpetrige Säure — weak acid, HNO2
  • Hungarian: salétromossav — weak acid, HNO2
  • Irish: aigéad nítriúil — weak acid, HNO2
  • Italian: acido nitroso — weak acid, HNO2
  • Japanese: 亜硝酸 (ashōsan) — weak acid, HNO2
  • Polish: kwas azotawy — weak acid, HNO2
  • Portuguese: ácido nitroso — weak acid, HNO2
  • Romanian: acid azotos — weak acid, HNO2
  • Russian: азо́тистая кислота́ (azótistaja kislotá) — weak acid, HNO2
  • Spanish: ácido nitroso — weak acid, HNO2
  • Swedish: salpetersyrlighet — weak acid, HNO2