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aqua regia

aq·ua re·gi·a [ àkwə rjee ə, àkwə rjə ]


noun 
Definition:
 
highly corrosive mixture of acids: a fuming, highly corrosive mixture of nitric and hydrochloric acids. Use: dissolving gold and other metals.

[Early 17th century. < Latin, "royal water"; because it can dissolve "noble" metals]
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