gas and air

noun

An equal mixture of nitrous oxide and oxygen, used as a mild analgesic and anaesthetic, particularly during childbirth, for dental procedures, and in emergency medicine.

“Near-synonym: Entonox (trade name: one particular brand)”

Similar
Entonox
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Meanings

noungas and air (uncountable)
  1. idiomaticuncountablemedicineAn equal mixture of nitrous oxide and oxygen, used as a mild analgesic and anaesthetic, particularly during childbirth, for dental procedures, and in emergency medicine.

    Near-synonym: Entonox (trade name: one particular brand)

    1 more example

    Meronyms: nitrous oxide, N₂O; oxygen (strict sense), oxygen (loose sense), dioxygen, O₂

    Synonyms: Entonox

  2. uncountableUsed other than figuratively or idiomatically: see gas, and, air.

Synonyms & antonyms

nounAn equal mixture of nitrous oxide and oxygen, used as a mild analgesic and anaesthetic, particularly during childbirth, for dental procedures, and in emergency medicine.

Similar
Entonox
Also see
entonox
Cite this entry
APA

gas and air. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/gas%20and%20air

MLA

“gas and air.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/gas%20and%20air. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “gas and air,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/gas%20and%20air.

Source: gas and air on Wiktionary, CC BY-SA 4.0.