from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A colorless, sweet-tasting gas, N2O, used as a mild anesthetic in dentistry and surgery.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun inorganic chemistry A non-flammable gas (N2O) commonly used in surgery and dentistry for its
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun inhalation anesthetic used as an anesthetic in dentistry and surgery
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