Ăthĕsis or Ătĕsis, is, m. (acc. Athesim; abl. Athesi; v. Neue, Formenl. I. pp. 210, 228), = Ἄταγις, Strabo, a river in Upper Italy, now the Adige: Atesis, Plin. 3, 16, 20, § 121 Jan: Athesim propter amoenum, Verg. A. 9, 680 Rib.; Sil. 8, 595; Claud. VI. Cons. Hon. 196; cf. Mann. Ital. I. p. 143.