nitrous oxide

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English

Noun

nitrous oxide (uncountable)

  1. (inorganic chemistry) A non-flammable gas (N₂O) commonly used in surgery and dentistry for its anaesthetic and analgesic effects.
    Synonyms: (anaesthetic) laughing gas, dinitrogen oxide, dinitrogen monoxide, (slang) hippy crack, (propellant) E942
    Hypernym: greenhouse gas

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