tredecillion

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

Definition of tredecillion

US : a number equal to 1 followed by 42 zeros — see Table of Numbers; alsoBritish : a number equal to 1 followed by 78 zeros — see Table of Numbers

Origin and Etymology of tredecillion

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


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