nitrous
noun(ni-trous)
nitrous oxide
nitrous
adjective(ni-trous)
of, relating to, or containing niter
nitrous
noun(ni-trous)
an unstable acid HNO2 known only in solution or in the form of its salts or esters
nitrous
noun(ni-trous)
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