From protos and kathedra; a sitting first (in the front row), i.e. Preeminence in council -- chief (highest, uppermost) seat.

see GREEK protos

see GREEK kathedra

πρωτοκαθεδρίαν (prōtokathedrian) − 1 Occurrence

πρωτοκαθεδρίας (prōtokathedrias) − 3 Occurrences