quadrillion
英 [kw?'dr?lj?n]
美[kwɑ'dr?lj?n]
- n. 百萬之四次方；千的五次方
- adj. 千之五次方的
詞態(tài)變化
復(fù)數(shù):?quadrillions;
中文詞源
quadrillion 千的五次冪(1015)
quadr-,四，-illion,百萬，縮寫自million.此處為million乘以三次1000.比較billion,trillion.
英文詞源
- 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).