exhereditation

from The Collaborative International Dictionary of English v.0.48

Exhereditation \Ex`he*red`i*ta"tion\, n. [LL. exhereditare,
   exhereditatum, disinherit.]
   A disinheriting; disherison. [R.] --E. Waterhouse.

   Syn: exheredation. [1913 Webster]