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English definition of “laughing gas”

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laughing gas

noun [U] uk   informal us  
nitrous oxide : a type of gas that is used as an anaesthetic (= a substance that stops pain)
Translations of “laughing gas”
in Chinese (Traditional) 笑氣…
in Chinese (Simplified) 笑气…
(Definition of laughing gas from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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