septillion

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noun, often attributive sep·til·lion \sep-ˈtil-yən\

Definition of septillion

  1. US :  a number equal to 1 followed by 24 zeros — see number table; also, British :  a number equal to 1 followed by 42 zeros — see number table

Origin and Etymology of septillion

French, from Latin septem + French -illion (as in million) — more at seven

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