一切經音義 25.25

25.25

'Three-thousand great-thousand' [trisāhasramahāsāhasra] (One set of four continents illuminated by one sun and moon is called one world system; one thousand such world systems are called a small-thousand; one thousand small-thousand are called a medium-thousand; one thousand medium-thousand are called a great-thousand; hence it is called three-thousand great-thousand. Their number is ten billion; there are three tiers of 'billion' [yì], as explained in Fascicle 4).