tredecillion

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noun, often attributive tre·de·cil·lion \ˌtrē-di-ˈsil-yən\

Definition of tredecillion

  1. US :  a number equal to 1 followed by 42 zeros — see number table; also, British :  a number equal to 1 followed by 78 zeros — see number table

Origin and Etymology of tredecillion

Latin tredecim thirteen (from tres three + decem ten) + English -illion (as in million) — more at three, ten


First Known Use: 1850

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