A prefix formerly much used to denote that the ingredient to
   the name of which it was prefixed was present in a large, or unusually
   large, proportion as compared with the other ingredients; as in calcium
   superphosphate. It has been superseded by per-, bi-, di-, acid, etc.
   (as peroxide, bicarbonate, disulphide, and acid sulphate), which retain
   the old meanings of super-, but with sharper definition. Cf. Acid, a.,
   Bi-, Di-, and Per-.