monoxide

noun

mon·​ox·​ide mə-ˈnäk-ˌsīd 

: an oxide containing one atom of oxygen in a molecule

Examples of monoxide in a Sentence

Recent Examples on the Web

These include water vapor, carbon monoxide, methane and, for the first time ever in a planetary atmosphere, silicon monoxide. —Sharmila Kuthunur, Space.com, 4 June 2025

This revealed details of the new type of long and narrow filamentary structures seen in the spectral lines of silicon monoxide and eight other molecules in the CMZ. —Robert Lea, Space.com, 21 Mar. 2025

Gene Hackman's Wife Betsy Arakawa's Body Had Signs of 'Mummification' When It Was Discovered Making matters more mysterious, the local Fire Department and gas company found no immediate indication there was a gas leak or possible monoxide poisoning or leak, per the affidavit. —Ben Brachfeld, People.com, 28 Feb. 2025

In particular, silicon monoxide proved useful in tracking energetic rippling shockwaves. —Robert Lea, Space.com, 21 Mar. 2025

Word History

Etymology

International Scientific Vocabulary

First Known Use

1868, in the meaning defined above

Phrases Containing monoxide

• carbon monoxide
• chlorine monoxide
• lead monoxide

Rhymes for monoxide

• hydroxide
• tetroxide

Kids Definition

monoxide

noun

mon·​ox·​ide mə-ˈnäk-ˌsīd 

: an oxide containing only one oxygen atom in the molecule

Medical Definition

monoxide

noun

mon·​ox·​ide mə-ˈnäk-ˌsīd 

: an oxide containing one atom of oxygen per molecule see carbon monoxide