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单词 trillion
释义 trillion
n. (pl. same or (in sense 3) trillions)
  1. a million million (1,000,000,000,000 or 10(12)).
  2. (formerly, esp. Brit.) a million million million (1,000,000,000,000,000,000 or 10(18)).
  3. (in pl.) colloq. a very large number (trillions of times).
Usage
Senses 1-2 correspond to the change in sense of billion.
Derivatives
trillionth adj. & n.
Etymology: F trillion or It. trilione (as TRI-, MILLION), after billion
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