Lewis & Short

Thermē, ēs, f., = Θέρμη, a town in Macedonia, afterwards Thessalonica, Plin. 4, 10, 17, § 36.
Hence, adjj.

  1. A. Ther-maeus, a, um, of Therme: sinus, the Thermaic Gulf, now il Golfo di Salonichi, Tac. A. 5, 10.
  2. B. Thermăĭcus, a, um, = Θερμαϊκός, of Therme: sinus, the same, Mel. 2, 3, 1; Plin. 4, 10, 17, § 35.