aqua-regia

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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