quadrillion
英 [kw?'dr?lj?n]
美[kwɑ'dr?lj?n]
- n. 百万之四次方；千的五次方
- adj. 千之五次方的
词态变化
复数:?quadrillions;
中文词源
quadrillion 千的五次幂(1015)
quadr-,四，-illion,百万，缩写自million.此处为million乘以三次1000.比较billion,trillion.
英文词源
- quadrillion (n.)
- 1670s, from French quadrillion (16c.) from quadri- "four" (see quadri-) + (m)illion. Compare billion. In Great Britain, the fourth power of a million (1 followed by 24 zeroes); in the U.S., the fifth power of a thousand (1 followed by 15 zeroes).