The Collaborative International Dictionary
disherison
disherison \dis*her"i*son\ (d[i^]s*h[e^]r"[i^]z'n), n. [See
Disherit.]
The act of disheriting, or debarring from inheritance;
disinherison.
--Bp. Hall.
Wiktionary
disherison
n. The act of disheriting, or debarring from inheritance.