septillion

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

Definition of septillion

US : a number equal to 1 followed by 24 zeros — see Table of Numbers; alsoBritish : a number equal to 1 followed by 42 zeros — see Table of Numbers

Origin and Etymology of septillion

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


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