Lewis & Short

Ŏdessos or Ŏdessus, i, f., = Ὀδησσός, a city of Lower Mœsia, on the Pontus Euxinus, now Varna, Mel. 2, 2; Plin. 4, 12, 18, § 45.
Also written Ŏdyssus (-os), Amm. 32, 9.