Meaning of gas and air | Babel Free

Definitions

1. 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.
   idiomatic, uncountable
2. Used other than figuratively or idiomatically: see gas, and, air.
   uncountable

Examples

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

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

CEFR level