quadrillion A thousand million million (1015). In Britain it used to mean a million to the power of 4 (1024), but this use is largely obsolete.
quadrillion
数学辞典收录了4151条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。