Lewis & Short

Mĕsembrĭa, ae, f., = Μεσημβρία, a city in Thrace, on the Black Sea, now Missiori, Mel. 2, 2, 5; Plin. 4, 11, 18, § 45.
Hence, Mĕsembrĭăcus, a, um, adj., Mesembrian, Ov. Tr. 1, 10, 37.