dispositor

from The Collaborative International Dictionary of English v.0.48

Dispositor \Dis*pos"it*or\, n. [L. See {Disposition}.]
   1. A disposer.
      [1913 Webster]

   2. (Astrol.) The planet which is lord of the sign where
      another planet is. [Obs.] --Crabb.
      [1913 Webster]