Lewis & Short

Ĭādĕra, ae, f.,

  1. I. a city of Illyria, now Zara, Mel. 2, 3, 13; also called Ĭāder, Plin. 3, 26, 30, § 152; 3, 21, 25, § 140 al.; Luc. 4, 405.
    Hence,
  2. II. Ĭādertīni, ōrum, m., the inhabitants of ladera, Auct. B. Alex. 42.