Lewis & Short

Nĭsĭbis or Nĕsĕbis, is, f., = Νίσιβις.

  1. I. A city in Mesopotamia, now Nisibin, Plin. 6, 13, 16, § 42; Tac. A. 15, 5; Amm. 25, 7, 9; 25, 8, 27
    Hence,
    1. B. Nĭsĭbēni, ōrum, m., the inhabitants of Nisibis, Amm. 25, 8, 13.
  2. II. A city in Aria, Amm. 23, 6, 69.