from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A corrosive, fuming, volatile mixture of hydrochloric and nitric acids, used for testing metals and dissolving platinum and gold.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun obsolete, inorganic chemistry A mixture of three parts concentrated
hydrochloric acidto one part concentrated nitric acid.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a yellow fuming corrosive mixture of nitric and hydrochloric acid that dissolves metals (including gold)
from The American Heritage® Dictionary of the English Language, 4th Edition
[New Latin aqua rēgia : Latin aqua, water + Latin rēgia, feminine of rēgius, royal (because it dissolves gold, the “royal metal”).]
from Wiktionary, Creative Commons Attribution/Share-Alike License
Latin aqua regia, royal water, so named because it is one of the few solvents capable of dissolving noble metals.
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