English word origin

Etymology of NOx

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

2 source sectionsExtended source reportWiktionary original ↗

In this entry · 2 source sections

The source etymologies

Wiktionary via Kaikki / Wiktextract

The source reports below are imported and unreviewed by *SET-U. Separate numbered origins and differing source variants are preserved; agreement within this extraction is not independent corroboration.

Source etymology 1

Original entry ↗

noun

Any of the various nitrogen oxides produced during combustion.

Selected source glosses provide context, not a complete modern definition inventory

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

Relationships mentioned by the source

These are extracted mentions, not a timeline or a verified sequence of immediate parents.

Compound componentNen
Compound componentOen
Compound componentxen

Inspect preserved source fields

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

{
  "templates": [
    {
      "name": "compound",
      "args": {
        "1": "en",
        "2": "N",
        "3": "O",
        "4": "x",
        "gloss1": "nitrogen",
        "gloss2": "oxygen",
        "gloss3": "x substitution value"
      },
      "expansion": "N (“nitrogen”) + O (“oxygen”) + x (“x substitution value”)"
    }
  ],
  "links": [
    [
      "N",
      "N#English"
    ],
    [
      "O",
      "O#English"
    ],
    [
      "x",
      "x#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "Any of the various nitrogen oxides produced during combustion."
      ],
      "tags": [],
      "recordId": "3bb373d6364e37dc1aa5674666ac3772ed2649eaf445f38b8c9ede4f059a0451",
      "rawRecordSha256": "36872d25ad0df7e8c469be42fe2cd708353a634617f5adc499d5617489410bb1",
      "sourceRecordOrdinal": 882358
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 0,
    "glosses": 0
  }
}

Source etymology 2

Original entry ↗

noun

Alternative form of nox (“nitrous oxide”).

Selected source glosses provide context, not a complete modern definition inventory

From N (“nitrous”) + Ox (“oxygen”).

Relationships mentioned by the source

These are extracted mentions, not a timeline or a verified sequence of immediate parents.

Compound componentNen
Compound componentOxen

Inspect preserved source fields

Raw extraction fields are retained for auditing. Their order does not establish ancestry.

{
  "templates": [
    {
      "name": "compound",
      "args": {
        "1": "en",
        "2": "N",
        "3": "Ox",
        "gloss1": "nitrous",
        "gloss2": "oxygen"
      },
      "expansion": "N (“nitrous”) + Ox (“oxygen”)"
    }
  ],
  "links": [
    [
      "N",
      "N#English"
    ],
    [
      "Ox",
      "Ox#English"
    ]
  ],
  "references": [],
  "descendants": [],
  "lexical": [
    {
      "pos": "noun",
      "glosses": [
        "Alternative form of nox (“nitrous oxide”)."
      ],
      "tags": [
        "alt-of",
        "alternative",
        "uncountable"
      ],
      "recordId": "36b8ad918fdcaad1a4f366a72df684b7feb8cb21279a26bb4b7a4b05c93d712a",
      "rawRecordSha256": "73a1073aecc7b7f09039b5a86d7fb41ecd7de1673377d316a77a3a396cd92cae",
      "sourceRecordOrdinal": 882359
    }
  ],
  "omittedAuxiliaryFields": {
    "templates": 0,
    "links": 0,
    "references": 0,
    "descendants": 0,
    "lexicalRecords": 0,
    "lexicalSenses": 0,
    "glosses": 0
  }
}

Where this record stops

This page does not supply an independently verified sound-change sequence, first-use manuscript or complete family tree unless a cited analysis explicitly establishes one. Missing detail here is a limit of this record—not a claim that humanity knows nothing more.

An older meaning does not determine what a word must mean today. Follow the sources, preserve disagreements, and keep ancestry separate from interpretation.

Contribute located evidence for NOx →

Source and snapshot

Imported from Wiktionary contributors; extracted by Tatu Ylonen / Wiktextract / Kaikki.org. Selected fields are reformatted and grouped; wording, source identity and etymology sections are retained. CC-BY-SA-4.0 applies to the imported source material.

Dump: 2026-10-01 · Extracted: 2026-10-30. These are snapshot dates, not the word’s first attestation or the page’s revision date.

Source entry and bibliography ↗Wiktionary revision history ↗Acquisition and rights ledger

Machine-source provenance

Source SHA-256: 5ff2c072f8099f2d2ce484bd6957bf179f046d2ad37bc36555edf8bb84cb5291
Import run: 73216b9a9b78ed3830994bf853103716f5a4dc57099e371e9f8fdc468facca26
Permanent entry ID: w-Tk94