in Ancient Geography, an appellation comprising, according to the more ancient Greeks and Romans, Achaia and Peloponnesus, but afterwards restrained to Achaia. It was bounded on the west by the river Achelous, on the north by mountains Othrys and Oeta, on the east by the Egean sea, and on the south by the Saronic and Corinthian bays, and by the isthmus which joins it to Peloponnesus. It was called Hellas, from Hellen the son of Deucalion; or from Hellas, a district of Thessaly; whence Hellenes, the gentilious name, denoting Greek. Now called Liviadria.