There was no specific term for peninsula in ancient Greek, proven by that the word nesos, used to describe the “island” of Atlantis, was used in the name Peloponnesos which is a peninsula. After Plato had written about Atlantis, chersonesos became the greek word for peninsula, meaning dry island, not completely surrounded by water one could suppose, which jibes with the contemporaneous Latin term paene-insula meaning almost an island, a peninsula.
