monoxide

American  

[mon-ok-sahyd, muh-nok-] / mɒnˈɒk saɪd, məˈnɒk- /

noun

Chemistry.

1. an oxide containing one oxygen atom in each molecule.

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monoxide British  

/ mɒˈnɒksaɪd /

noun

1. an oxide that contains one oxygen atom per molecule

   carbon monoxide, CO

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monoxide Scientific  

/ mə-nŏk′sīd′ /

1. A compound consisting of two elements, one of which is a single oxygen atom. Carbon monoxide, for example, contains a carbon atom bound to a single oxygen atom.

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Etymology

Origin of monoxide

First recorded in 1865–70; mon- + oxide

Example Sentences

See Examples For:

monoxide

EPA officials said on a call Monday that the change will not include pollutants that directly harm health such as carbon monoxide and nitrogen dioxide, which are regulated separately.

From Los Angeles Times ● Sep. 14, 2026

Emissions of carbon monoxide, nitrous oxide and dangerous particulate matter increased by 196%, 111%, and 139% respectively.

From The Wall Street Journal ● Sep. 7, 2026

The signal contained carbon monoxide absorption lines arranged in a barcode-like sequence, a feature commonly expected in the atmospheres of giant planets.

From Science Daily ● Jul. 23, 2026

State media initially reported four deaths and dozens trapped after levels of carbon monoxide -- a highly toxic, odourless gas -- in the mine were found to have "exceeded limits".

From Barron's ● May 23, 2026

“Carbon monoxide plus iron gives the volatile iron carbonyl.”

From "I, Robot" by Isaac Asimov