carbon monoxide

noun

: a colorless odorless very toxic gas CO that is formed as a product of the incomplete combustion of carbon or a carbon compound

Examples of carbon monoxide 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

And other possible factors, such as heat exposure or carbon monoxide poisoning, were ruled out by investigators. — Alex Brizee july 22, Idaho Statesman, 22 July 2026

This specific dimming trait was not shared by atmospheric carbon monoxide the team checked, which remained essentially unchanged from center to limb, Bézard said, which helped the team infer that this mystery molecule likely resides on the ground. — Sharmila Kuthunur, Space.com, 20 July 2026

Install carbon monoxide and smoke alarms on all levels of your home and replace batteries often. — Dr. Lauren Zajac, Boston Herald, 19 July 2026

Word History

First Known Use

1868, in the meaning defined above

Rhymes for carbon monoxide

• hydroxide
• tetroxide

Kids Definition

carbon monoxide

noun

: a colorless odorless very poisonous gas formed by the incomplete burning of carbon

Medical Definition

carbon monoxide

noun

: a colorless odorless very toxic gas CO that burns to carbon dioxide with a blue flame and is formed as a product of the incomplete combustion of carbon