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nitrous oxide (uncountable)

  1. (inorganic chemistry) A non-flammable gas (N₂O) commonly used in surgery and dentistry for its anaesthetic and analgesic effects and in motorsport for bursts of added power.
    Synonyms: (anaesthetic) laughing gas, dinitrogen oxide, dinitrogen monoxide, (slang) hippy crack, (propellant) E942, (automotive) nos, (automotive) nox, NOx, N₂O, N2O
    Hypernyms: greenhouse gas, nox, NOx

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