Lewis & Short

Cĭŏs, i, m.

  1. I. A river in Bithynia, Plin. 5, 32, 40, § 144.
  2. II. A town at the mouth of the river Cios, now Ghio or Ghemlio, Liv. 32, 34, 4; Mel. 1, 19, 4; Plin. l. c. v. Ciani.