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]

Collins English Dictionary - Complete & Unabridged 10th Edition
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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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

aqua regia

mixture of concentrated nitric and hydrochloric acids, usually one part of the former to three parts of the latter by volume. This mixture was given its name (literally, "royal water") by the alchemists because of its ability to dissolve gold and other so-called noble metals.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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