quadrillion

英 [kwɒ'drɪljən] 美 [kwɑː'drɪljən]

• n. 千的五次方
• adj. 千之五次方的

英英释义

Noun:

1. the number that is represented as a one followed by 24 zeros;

   "in England they call a septillion a quadrillion"
   

2. the number that is represented as a one followed by 15 zeros