Lewis & Short

Nīcŏmēdīa, ae, f., = Νικομήδεια,

  1. I. the capital of Bithynia, now Izmid, Plin. 5, 32, 43, § 149; Amm. 22, 9, 3; Aur. Vict. Caes. 39, 45.
    Hence,
  2. II. Nīcŏmēdenses, ĭum, m., the Nicomedians, Plin. et Traj. Ep. 37 (46), 1; Dig. 50, 9, 5; Inscr. Grut. 389, 2.