Plato was writing about two kinds of nesos in describing the extent of the ice age empire of Atlantis and the city of concentric canals to the west of Gibraltar (the Pillars of Hercules), nesos meaning coastline of a peninsula (as in Peloponnesos) for the extent of greater Atlantis, and nesos meaning island, the city of Posidon and his son Atlas on an island amidst the concentric canals. Using the coastline-of-a-peninsula definition of nesos, Plato wrote that greater Atlantis was larger than Asia and Libya combined, meaning the Mediterranean coastline of Asia down then across to Libya.
