单词	aqua regia
释义	aqua regia noun aqua re·​gia ˈä-kwə-ˈrē-j(ē-)ə  ˈa-kwə-  : a mixture of nitric and hydrochloric acids that dissolves gold or platinum Example Sentences Recent Examples on the Web As German troops marched in the streets of Copenhagen, chemist George de Hevesy stashed the medals in aqua regia, an acid strong enough to dissolve gold. National Geographic, 2 Oct. 2017 Word History Etymology New Latin, literally, royal water First Known Use 1617, in the meaning defined above Medical Definition aqua regia noun aqua re·​gia -ˈrē-j(ē-)ə  : a mixture of nitric and hydrochloric acids that dissolves gold or platinum called also nitrohydrochloric acid
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