Laughing gas Meaning, Definition & Usage

  1. noun inhalation anesthetic used as an anesthetic in dentistry and surgery
    nitrous oxide.

WordNet


Definitions
  1. . See under Laughing.
Definitions
  1. (Chem.), hyponitrous oxide, or protoxide of nitrogen = nitrous oxide ; so called from the exhilaration and laughing which it sometimes produces when inhaled. It is much used as an anæsthetic agent. now primarily in dentistry

Webster 1913