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

On Sunday, Japanese authorities said the 10th fatality was a man in his 30s who was found dead at his home from carbon monoxide poisoning.

From BBC ● Aug. 17, 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

He defended crafts chain Michael’s against claims that toxic levels of carbon monoxide at one of its stores caused brain damage to an employee’s unborn daughter.

From The Wall Street Journal ● Apr. 7, 2026

One of the two teenagers who died of suspected carbon monoxide poisoning at a holiday park in East Yorkshire had complained of a headache before they were last seen alive, an inquest heard.

From BBC ● Mar. 10, 2026

“Seven tons of it wouldn’t have been enough—and we haven’t the hours to spare to get it, even if it were, with the monoxide chewing him away. Don’t you see what it is, Mike?”

From "I, Robot" by Isaac Asimov