%decanal%

a. [ Cf. F. décanal. See Dean. ] Pertaining to a dean or deanery. [ 1913 Webster ]

His rectorial as well as decanal residence. Churton. [ 1913 Webster ]

Decanal side, the side of the choir on which the dean's tall is placed. --
Decanal stall, the stall allotted to the dean in the choir, on the right or south side of the chancel. Shipley. [ 1913 Webster ]