You searched for: “aqua regalia”
aqua regia; aqua regalia (s) (noun)
1. Royal water: a fuming, highly corrosive mixture of nitric and hydrochloric acids.
2. Another term for nitrohydrochloric acid.

Called "royal water" because of its power to dissolve gold.

Aqua regia is used for testing metals and dissolving platinum and gold.

This entry is located in the following units: aqua-, aquatic-, aqui-, aqu-, -aquatically, aque-, -aqueous (page 1) Latin Proverbs, Mottoes, Phrases, and Words: Group A (page 17)