Dictionary
nitrous oxide
noun
: a gas that is used by dentists to keep patients from feeling pain
Full Definition of NITROUS OXIDE
: a colorless gas N2O that when inhaled produces loss of sensibility to pain preceded by exhilaration and sometimes laughter, that is used especially as an anesthetic in dentistry and as a fuel, and that is an atmospheric pollutant and greenhouse gas produced by combustion —called also laughing gas
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First Known Use of NITROUS OXIDE
1798
Medical Dictionary
nitrous oxide
noun
Medical Definition of NITROUS OXIDE
: a colorless gas N2O that when inhaled produces loss of sensibility to pain preceded by exhilaration and sometimes laughter and is used especially as an anesthetic in dentistry—called also laughing gas
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