‖n. [ L. See Ewer. ] Water; -- a word much used in pharmacy and the old chemistry, in various signification, determined by the word or words annexed. [ 1913 Webster ]

Aqua ammoniæ, the aqueous solution of ammonia; liquid ammonia; often called aqua ammonia. --
Aqua marine or
Aqua marina Same as Aquamarine. --
Aqua regia [ 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 woman named Tofana, in the middle of the 17th century, who is said to have poisoned more than 600 persons. Francis. --
Aqua vitæ ety>[ L., water of life. Cf. Eau de vie, Usquebaugh ], a name given to brandy and some other ardent spirits. Shak. [ 1913 Webster ]

adj. 1. of or pertaining to aquiculture. aquacultural methods
Syn. -- aquicultural, hydroponic [ WordNet 1.5 ]

adj. 1. the cultivation of aquatic animals, such as fish or shellfish, or of plants, such as seaweed, in a controlled and sometimes enclosed body of water. The term includes use of either salt or fresh water. It is a form of agriculture, but under water. [ PJC ]

‖ [ L., strong water. ] (Chem.) Nitric acid. [ Archaic ] [ 1913 Webster ]

n. an apparatus containing compressed air or other oxygen-gas mixture, permitting a person to breathe under water; -- also called a scuba.
Syn. -- scuba [ WordNet 1.5 +PJC ]

n. (Min.) A transparent, pale green variety of beryl, used as a gem. See Beryl. [ 1913 Webster ]

n. [ L. aqua water, + punctura puncture, pungere, punctum, to, prick. ] (Med.) The introduction of water subcutaneously for the relief of pain. [ 1913 Webster ]

‖n. [ F., fr. Ital acquerello, fr. acqua water, L. aqua. ] A design or painting in thin transparent water colors; also, the mode of painting in such colors. [ 1913 Webster ]

n. A painter in thin transparent water colors. [ 1913 Webster ]

{ } a. Of or pertaining to an aquarium. [ 1913 Webster ]