nitrogen oxide

noun

: any of several oxides of nitrogen most of which are produced in combustion and are considered to be atmospheric pollutants: such as

a

: nitric oxide

b

: nitrogen dioxide

c

: nitrous oxide

Examples of nitrogen oxide in a Sentence

Recent Examples on the Web

Using precious metals and chemical reactions, catalytic converters transform harmful carbon monoxide, hydrocarbons and nitrogen oxides into significantly less harmful carbon dioxide, nitrogen and water vapor. — Peter Lyon, Forbes.com, 22 July 2026

That’s because wildfire smoke contains gases like nitrogen oxides and volatile organic compounds, which react in the sun and heat to create ground-level ozone. — Kasha Patel, CNN Money, 17 July 2026

The types of turbines SpaceXAI used in Memphis can emit thousands of tons of smog-forming nitrogen oxides per year, according to manufacturers' spec sheets. — Lora Kolodny,jeniece Pettitt, CNBC, 16 July 2026

Wildfire smoke is a complex mixture that includes nitrogen oxides, volatile organic compounds, polycyclic aromatic hydrocarbons, carbon monoxide, carbon dioxide and particulate matter. — Colleen E. Reid, The Conversation, 16 July 2026

Word History

First Known Use

1868, in the meaning defined above

Rhymes for nitrogen oxide

• acetaldehyde
• acetanilide
• arabinoside
• cycloheximide
• cyclophosphamide
• diethylamide
• dinucleotide
• ferricyanide
• ferrocyanide
• glutaraldehyde
• glyceraldehyde
• hydroperoxide

Kids Definition

nitrogen oxide

noun

: any of various oxides of nitrogen: as

a

: nitrogen dioxide

b

: nitrous oxide