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
- n. See under Laughing.
- 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 anæsthetic agent.
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
From its euphoric effects. (Wiktionary)