aqua regia

Definitions of aqua regia
  1. noun
    a yellow fuming corrosive mixture of nitric and hydrochloric acid that dissolves metals (including gold)
    synonyms: nitrohydrochloric acid
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    type of:
    acid
    any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
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