Lewis & Short

Pallēnē, ēs, f., = Παλλήνη, a peninsula and town of Macedonia, on the Thermaic Gulf, also called Phlegra, where the battle between the gods and the giants took place, Plin. 4, 10, 17, § 36; Ov. M. 15, 356; Val. Fl. 2, 17; Sen. Herc. Fur. 979.
Hence,

  1. A. Pallēnaeus, a, um, adj., of or belonging to Pallene, Luc. 7, 150: triumphi, Stat. S. 4, 2, 56.
  2. B. Pallēnensis, e, adj., Pallenian: ager, Liv. 44, 10: isthmus, Plin. 4, 10, 17, § 36.