# oxo-

> English word · Prefix · IPA /ɒk.sə(ʊ)/

## Definitions
1. Oxygen.
2. Having a methylene group replaced by a carbonyl group.

## Etymology
From oxygen + -o-.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/oxo