Lewis & Short

Pălămēdes, is, m., = Παλαμήδης, son of Nauplius, king of Eubœa, who lost his life before Troy, through the artifices of Ulysses, Cic. Tusc. 1, 41, 98; id. Off. 3, 26, 98; Auct. Her. 2, 19, 28. He is said, by observing the flight of cranes, to have invented the letters Θ, Ξ, Φ, Χ, acc. to others the letters Υ and Δ, Plin. 7, 56, 57, § 192; Mart. 13, 75, 2.
Hence,

  1. A. Pălămēdēus, a, um, adj., Palamedean, Manil. 4, 206.
  2. B. Pă-lămēdĭăcus, a, um, adj., Palamedic: Palamediaci calculi, the counters in the game of draughts which Palamedes invented, Cassiod. Var. 8, 31.
  3. C. Pălămēdĭ-cus, a, um, adj., Palamedic, Aus. Techn. de Monosyll. 25.