Aqua-regia

aqua regia

[ree-jee-uh]
noun Chemistry.
a yellow, fuming liquid composed of one part nitric acid and three to four parts hydrochloric acid: used chiefly to dissolve metals as gold, platinum, or the like.


Origin:
1600–10; < Neo-Latin: literally, royal water

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World English Dictionary
aqua regia (ˈriːdʒɪə)
 
n
Also called: nitrohydrochloric acid a yellow fuming corrosive mixture of one part nitric acid and three to four parts hydrochloric acid, used in metallurgy for dissolving metals, including gold
 
[C17: from New Latin: royal water; referring to its use in dissolving gold, the royal metal]

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American Heritage
Science Dictionary
aqua regia   (rē'jē-ə, rē'jə)  Pronunciation Key 
A corrosive, fuming, volatile mixture of hydrochloric and nitric acids. Aqua regia is used for testing metals and dissolving platinum and gold.
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