quadrillion
/kwɒˈdrɪljən/cardinal number
(pl. quadrillions, 或［与数字连用时］复同单)
1- a thousand raised to the power of five (1015). 1015（1,000的5次幂）。
1.1
- dated, chiefly Brit. a thousand raised to the power of eight (1024) 〈旧, 主英〉1024（1,000的8次幂）。
派生词
quadrillionth
ordinal number词源
late 17th cent.: from French， from million, by substitution of the prefix quadri- 'four' for the initial letters.