Lewis & Short

Coptŏs, i, f., = Κοπτός, Κοπτώ, a trading town in the Thebaid, on the eastern side of the Nile, afterwards Justinianopolis, now Coft, Plin. 5, 9, 11, § 60; Juv. 15, 28; Amm. 22, 16, 2; Itin. Ant. p. 165, 6 al.
Hence,

  1. A. Coptis, tĭdis, adj. f., = Κοπτίς, of Coptos, Plin. 36, 6, 9, § 52.
  2. B. Coptītēs, ae, adj. m., = Κοπτίτης, of Coptos: nomos, that of which Coptos was the capital, Plin. 5, 9, 9, § 49.
  3. C. Coptītĭcus, a, um, adj., of Coptos, i. e. Egyptian: adyta, App. M. 2, p. 127, 11.