三千大千世界
tri-sahasra-mah-sahasra-loka-dhtu, a great chiliocosm; 三千; 三千界, 三千世界. Mt. Sumeru and its seven surrounding continents, eight seas and ring of iron mountains form one small world; 1, 000 of these form a small chiliocosm 小千世界; 1, 000 of these small chiliocosms form a medium chiliocosm 中千世界; a thousand of these form a great chiliocosm 大千世界, which thus consists of 1, 000, 000, 000 small worlds. The 三千 indicates the above three kinds of thousands, therefore 三千大千世界 is the same as 大千世界, which is one Buddha-world.
