trillion
/ˈtrɪljən/cardinal number
(pl. trillions 或［与数词连用］复同单)
1- a million million (1,000,000,000,000 or 1012)一万亿, 一兆。
1.1
trillions
informal a very large number or amount〈非正式〉极多：the yammering of trillions of voices.
无数的哀号声。
1.2
- dated, chiefly Brit. a million million million (1,000,000,000,000,000,000 or 1018)〈旧, 主英〉一百万兆。
派生词
trillionth
ordinal number词源
late 17th cent.: from French, from million, by substitution of the prefix tri- 'three' for the initial letters.