Arcadocypriot, or southern Achaean, was an ancient Greek dialect spoken in Arcadia (the central Peloponnese) and Cyprus. Its resemblance to Mycenaean Greek, as it is known from the Linear B corpus, indicates that they are closely related to it, and belong to the same dialect group, known as Achaean.
In Cyprus the dialect was written solely using the Cypriot syllabary. The most extensive surviving text of the dialect is the Idalion Tablet. A significant literary source on the vocabulary comes from the lexicon of grammarian Hesychius (probably 5th century AD).