Lewis & Short

Ā̆drastēus a, um, or Ādrastīus, a, um, adj., pertaining to Adrastus: Arion, the horse given to Adrastus by Neptune, Stat. S. 1, 1, 52: Adrasteo pallore perfusus, Amm. 14, 11 (with ref. to Verg. A. 6, 480; cf. Adrastus).