dēcessor (noun M) : decedo, no. I. B. 2
* One who retires from a province he has governed; hence, with reference to his successor, a retiring officer (rare): successori decessor invidit, Cic. Scaur. Fragm. § 33, p. 187 ed. Beier; so Tac. Agr. 7; Dig. 1, 16, 4, § 4.
* In gen., a predecessor in office (late Lat.), August. in Psal. 43, 16 al.

s. TLL