in mythology, a river of Epirus. The poets feigned it to have been the son of Ceres, whom he hid in hell for fear of the Titans, and turned into a river, over which souls departed were ferried in their way to Elysium.

in Ancient Geography, a river of Thessalia, in Epirus; which, after forming the lake Achelous, at no great distance from the promontory of Chimerium, falls into the sea to the west of the Sinus Ambracius, in a course from north to south.

or Acheros, a river of the Bruttii in Italy, running from east to west; where Alexander king of Epirus was slain by the Lucani, being deceived by the oracle of Dodona, which bade him beware of Acheron.