aqua regiaPronunciation: /ˈriːdʒə/Definition of aqua regia noun [mass noun] Chemistry a mixture of concentrated nitric and hydrochloric acids. It is a highly corrosive liquid able to attack gold and other resistant substances. Origin: early 17th century: Latin, literally 'royal water'aqua regia in other Oxford dictionaries Definition of aqua regia in the US English dictionary
