'Nitrous oxide' definitions:

Definition of 'nitrous oxide'

(from WordNet)
noun
Inhalation anesthetic used as an anesthetic in dentistry and surgery [syn: nitrous oxide, laughing gas]

Definition of 'Nitrous oxide'

From: GCIDE
  • Nitrous \Ni"trous\, a. [L. nitrosus full of natron: cf. F. nitreux. See Niter.]
  • 1. Of, pertaining to, or containing, niter; of the quality of niter, or resembling it. [1913 Webster]
  • 2. (Chem.) Of, pertaining to, or designating, any one of those compounds in which nitrogen has a relatively lower valence as contrasted with nitric compounds. [1913 Webster]
  • Nitrous acid (Chem.), a hypothetical acid of nitrogen HNO2, not known in the free state, but forming a well known series of salts, viz., the nitrites.
  • Nitrous oxide. See Laughing gas. [1913 Webster]