nitrous oxide

noun

Definition of nitrous oxide

  1. :  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 — compare nitric oxide

First Known Use of nitrous oxide

1798


NITROUS OXIDE Defined for English Language Learners

nitrous oxide

noun

Definition of nitrous oxide for English Language Learners

  • : a gas that is used by dentists to keep patients from feeling pain


Medical Dictionary

nitrous oxide

noun

Medical Definition of nitrous oxide

  1. :  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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