What is "magistery"

Magistery \Mag"is*ter*y\, n. [L. magisterium the office of a chief, president, director, tutor. See Magistrate.]

1. Mastery; powerful medical influence; renowned efficacy; a sovereign remedy. [Obs.]
   --Holland.

2. A magisterial injunction. [R.]
   --Brougham.

3. (Chem.) A precipitate; a fine substance deposited by precipitation; -- applied in old chemistry to certain white precipitates from metallic solutions; as, magistery of bismuth.
   --Ure.

n. 1 mastery; powerful medical influence; renowned efficacy; a sovereign remedy. 2 A magisterial injunction. 3 (context chemistry English) A precipitate; a fine substance deposited by precipitation; applied in old chemistry to certain white precipitates from metallic solutions; as, magistery of bismuth.