trillion

number

/ˈtrɪljən/

1 000 000 000 000; one million million万亿；兆 You say a, one, two, several, etc. trillion without a final ‘s’ on ‘trillion’. Trillions (of…) can be used if there is no number or quantity before it. Always use a plural verb with trillion or trillions.
a trillion, trillions (of…)
(informal) a very large amount大量；无数 There are more examples of how to use numbers at the entry for hundred.
(old-fashioned, British English) one million million million; 1 000 000 000 000 000 000百万兆

Word Originlate 17th cent.: from French, from million, by substitution of the prefix tri- ‘three’ for the initial letters.

TOEFL BNC: 26476 COCA: 5167

trillion