一切經音義 21.233

21.233

狀如四洲（尒雅曰水中可居之地曰洲今四天下皆在四大海中故俱名洲也言狀如四洲者東洲形圓如日西洲形如半月南洲北廣南狹北洲其形正方）。

Shaped like the four continents (the Erya states that habitable land surrounded by water is called a continent; currently the four continents all reside within the four great oceans, hence they are all called continents; regarding 'shaped like the four continents': the eastern continent is circular like the sun; the western continent is shaped like a crescent moon; the southern continent is wide in the north and narrow in the south; the northern continent is square).