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 r&emacron;gia : Latin aqua, water + Latin r&emacron;gia, feminine of r&emacron;gius, 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.