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quadrillion

英 [kw?'dr?lj?n] 美[kwɑ'dr?lj?n]
  • n. 百萬(wàn)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(wàn)，縮寫(xiě)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).