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nitrous British & World English

Of or containing nitrogen, especially in a state of low valency

nitrous air British & World English

(A) Air supposedly charged with nitre. (b) = nitrous gas.

nitrous fumes British & World English

A toxic mixture of gaseous oxides of nitrogen.

nitrous acid British & World English

An unstable, weak acid, existing only in solution and in the gas phase, made by the action of acids on nitrites

nitrous oxide British & World English

A colourless gas with a sweetish odour, prepared by heating ammonium nitrate. It produces exhilaration or anaesthesia when inhaled and is used (mixed with oxygen) as an anaesthetic and as an aerosol propellant

nitrous vitriol British & World English

A solution of oxides of nitrogen in sulphuric acid produced during the manufacture of sulphuric acid by the lead chamber process.