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septendecillion

noun, often attributive
sep·​ten·​de·​cil·​lion | \ (ˌ)sep-ˌten-di-ˈsil-yən How to pronounce septendecillion (audio) \

Definition of septendecillion

US : a number equal to 1 followed by 54 zeros — see Table of Numbers also, British : a number equal to 1 followed by 102 zeros — see Table of Numbers

First Known Use of septendecillion

1848, in the meaning defined above

History and Etymology for septendecillion

Latin septendecim seventeen (from septem seven + decem ten) + English -illion (as in million) — more at ten

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