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

Carbon monoxide can also be created when people use portable generators or run cars in their garages to stay warm or charge their phones. — Jeremy Tanner, The Hill, 21 Jan. 2026

These ranged from complex organic molecules like methanol and ethanol to simple molecules like silicon monoxide. — Robert Lea, Space.com, 25 Feb. 2026

The red areas may indicate the presence of molecules such as silicon monoxide, which appear only when massive gas clouds collide. — Asuka Koda, CNN Money, 5 Mar. 2026

The titanium dioxide converts into titanium monoxide, a much less stable form and therefore more damaging to tissues in the body. — Nina Dietz, Wired News, 27 Sep. 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