Lewis & Short

2. Ctēsĭphōn, ontis, f., = Κτεσιφῶν, a town in Assyria, residence of the Parthian kings, Plin. 6, 26, 30, § 122; Tac. A. 6, 42; Amm. 23, 6, 23; Eutr. 8, 3; Spart. Sev. 16, 1.