AQUA n.
Aqua marina. Same as Aquamarine. -- Aqua regia. Etym: [L., royal water] (Chem.), a very corrosive fuming yellow liquid consisting of nitric and hydrochloric acids. It has the power of dissolving gold, the "royal" metal. -- Aqua Tofana, a fluid containing arsenic, and used for secret poisoning, made by an Italian wom…