monoxide

American  

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

noun

Chemistry.

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

---

monoxide British  

/ mɒˈnɒksaɪd /

noun

1. an oxide that contains one oxygen atom per molecule

   carbon monoxide, CO

---

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.

---

Etymology

Origin of monoxide

First recorded in 1865–70; mon- + oxide

Example Sentences

See Examples For:

monoxide

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

Researchers believe this change is caused by temperature effects rather than an actual increase in carbon monoxide abundance.

From Science Daily ● Jun. 11, 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

With the apartment windows open, you can taste the carbon monoxide rising from the street below.

From "The Girl on the Train" by Paula Hawkins