English

Noun

aqua regia ‎(uncountable) (abbreviation A.R.)

1. (inorganic chemistry) A mixture of three parts concentrated hydrochloric acid to one part concentrated nitric acid.
   • 2005, D.J. Krus, Elements of Propositional Calculus

     Consider another example. 'If gold is placed in aqua regia then it dissolves.' Aqua regia is a mixture of nitric and hydrochloric acids that dissolves gold or platinum. Observation of gold dissolving in aqua regia (argument 1 1) lends credence to the above conditional statement.
     Not placing the gold into aqua regia and gold not dissolving (argument 0 0) does not disprove the truth-value of this conditional.

Synonyms

• aqua regis
• nitro-hydrochloric acid

Translations