aqua regiaaqua re·gi·a
a mixture of nitric and hydrochloric acids
Origin of aqua regiaL, literally , kingly water: it dissolves the “noble metals,” gold and platinum
A corrosive, fuming, volatile mixture of hydrochloric and nitric acids, used for testing metals and dissolving platinum and gold. Also called nitrohydrochloric acid .
Origin of aqua regiaNew Latin aqua rēgia Latin aqua water Latin rēgia feminine of rēgius royal (because it dissolves gold, the “royal metal”)
(uncountable) (abbreviation A.R.)
- (obsolete, inorganic chemistry) A mixture of three parts concentrated hydrochloric acid to one part concentrated nitric acid.