Lewis & Short

collēgĭātus (conl-), i, m. [collegium], he who is with one in a society, college, corporation, etc., Cod. Just. 11, 17: De collegiatis, Cod. Th. 6, 30, 16; 7, 20, 12, § 3; so also Inscr. Orell. 3948 al.