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Laughing gas

noun

Definitions

Noun
  1. 1
    Nitrous oxide, especially when used as an anaesthetic. uncountable

    ""You know how matters stand, dear," said he. "I have explained it also to our friends here. You're not afraid are you?" "It won't be painful, George?" "No more than laughing-gas at the dentist's.""

  2. 2
    inhalation anesthetic used as an anesthetic in dentistry and surgery wordnet

Etymology

From its euphoric effects. Coined by British chemist Humphry Davy in 1799.

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