nitrous oxidenoun [ U ]
uk/ˌnaɪ.trəs ˈɒk.saɪd/us/ˌnaɪ.trəs ˈɑːk.saɪd/informal laughing gas specializeda type of gas with a sweet smell that is used as a weak anaesthetic (= substance that stops pain), especially by dentists
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Chemical elements
- alkali metal
- antimony
- calcium
- carbonic
- carbonic acid
- cesium
- cl
- graphene
- lithium
- nickel
- plutonium
- quicksilver
- sodium
- strontium
- sulphur
- transition metal
- tungsten
- urea
- vanadium
- zinc
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