Meanings
proper noun
- medicineA mixture of nitrous oxide and oxygen used as an analgesic, especially during labour.
Near-synonym: gas and air (informal and nonproprietary name)
1 more example
Meronyms: nitrous oxide, N₂O; oxygen (strict sense), oxygen (loose sense), dioxygen, O₂
Synonyms: gas and air
Synonyms & antonyms
proper nounA mixture of nitrous oxide and oxygen used as an analgesic, especially during labour.
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Also see
Origin
Brand name.
Full word history & related roots →Cite this entry
APA
Entonox. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/Entonox
MLA
“Entonox.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Entonox. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “Entonox,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/Entonox.
Source: Entonox on Wiktionary, CC BY-SA 4.0.