noun (abbreviation A.R.)
- An extremely powerful acid mixture composed of three parts concentrated hydrochloric acid to one part concentrated nitric acid.
Etymology: aquaLatin, aqua regia, royal water, so named because it is one of the few solvents capable of dissolving noble metals.
- French: eau régale
- German: Kí¶nigswasser
- Italian: acqua regia
- Spanish: agua regia
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