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NOx.

Any of the various nitrogen oxides produced during combustion.

3 characters1 syllables approx.English language

Meaning & usage

noun/ɛn əʊ ˈɛks/
  1. Any of the various nitrogen oxides produced during combustion.

Where this word comes from

From N (“nitrogen”) + O (“oxygen”) + x (“x substitution value”).

noun/ɛn əʊ ˈɛks/
  1. Alternative form of nox (“nitrous oxide”).

    alt-of · alternative · uncountable
Where this word comes from

From N (“nitrous”) + Ox (“oxygen”).

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.