Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Nitrous oxide, especially as used as an anesthetic.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A common name for nitrous oxide used as an anaesthetic.

from the GNU version of the Collaborative International Dictionary of English

  • hyponitrous oxide, or protoxide of nitrogen; -- so called from the exhilaration and laughing which it sometimes produces when inhaled. It is much used as an an├Žsthetic agent.
  • n. See under Laughing.

from The Century Dictionary and Cyclopedia

  • n. Nitrous oxid, or monoxid (N2O): so called because when inhaled it usually produces exhilaration, which is followed by insensibility.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. inhalation anesthetic used as an anesthetic in dentistry and surgery

Etymologies

From its euphoric effects. (Wiktionary)

Examples

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