Aqua

n.
  1. Water; -- a word much used in pharmacy and the old chemistry, in various signification, determined by the word or words annexed.
  2. Aqua ammoniæ ,
    the aqueous solution of ammonia; liquid ammonia; often called aqua ammonia.
    Aqua marine (), or Aqua marina ().
    Same as Aquamarine.
    Aqua regia (). ,
    a name given to brandy and some other ardent spirits.