gas and air

Definition

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.

Example Sentences

• "Meronyms: nitrous oxide, N₂O; oxygen (strict sense), oxygen (loose sense), dioxygen, O₂"
• "Near-synonym: Entonox (trade name: one particular brand)"