nitrous oxide

noun

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; compare nitric oxide

Recent Examples of nitrous oxide from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nitrous oxide.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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

: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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