Aqua Reʹgia [royal water]
.So called because it dissolves gold, the king of metals. It consists of one part of nitric acid, with from two to four of hydrochloric acid.
· 
· 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.