oxo
/ɑk.soʊ/noun
oxo is a noun meaning “A substituent oxygen atom connected to another atom by a double bond” (English Wiktionary, September 2026). It is spelled O-X-O and has 2 syllables, and it appears about once in every 3 million words in written English (wordfreq, 2021 data).
What does oxo mean?
noun
- 1
A substituent oxygen atom connected to another atom by a double bond.
- 2
The game of noughts and crosses.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How do you pronounce oxo?
- UK /ɒk.sə(ʊ)/
- US /ɑk.soʊ/
- US /ɑk.sə/
Oxo has 2 syllables (counted from the pronunciation).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Flame,_not_lame-oxo-.wav, LL-Q1860_(eng)-Flame,_not_lame-oxo.wav, Wikimedia Commons (author and licence on each file's page).
Forms of oxo
- ox-
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is oxo?
Oxo appears about once in every 3 million words in written English, the 49,949th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Where does oxo come from?
From oxygen + -o-.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).