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

First Known Use of NITROUS OXIDE

1798

nitrous oxide

noun    (Medical Dictionary)

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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