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trillion

From Wiktionary

Pronunciation

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Determiner

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Determiner
trillion

(indefinite) (number) (ordinal trillionth)

  1. (US, modern British and Australian, short scale) Trillion refers to the number 1,000,000,000,000 (1012)
    There are about one trillion (1012) bacteria on the surface of the human body.
  2. (older British and Australian, long scale) The number 1,000,000,000,000,000,000 (1018).
    There are about one trillion (1018) insects on Earth.

Noun

[change]

Singular
trillion

Plural
trillions

  1. (US, modern British and Australian, short scale) The number 1,000,000,000,000
    In the United States, one million millions is a trillion.
  2. (older British and Australian, long scale) The number 1,000,000,000,000,000,000.
    In the long scale, one million millions is a billion. One million billions is a trillion.
    A British trillion used to be one million American trillions, but they are mostly the same now.