The Collaborative International Dictionary
Dimissory
Dimissory \Dim"is*so*ry\ (?; 277), a. [L. dimissorius: cf. F. dimissoire. See Dimit.] Sending away; dismissing to another jurisdiction; granting leave to depart.
Letters dimissory (Eccl.), letters given by a bishop
dismissing a person who is removing into another diocese,
and recommending him for reception there.
--Hook.
Wiktionary
dimissory
a. 1 Granting permission to be ordained. 2 Granting permission to depart.