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undecillion

[ uhn-di-sil-yuhn ]
/ ˌʌn dɪˈsɪl yən /
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noun, plural un·de·cil·lions, (as after a numeral) un·de·cil·lion.

a cardinal number represented in the U.S. by 1 followed by 36 zeros, and in Great Britain by 1 followed by 66 zeros.

adjective

amounting to one undecillion in number.

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Origin of undecillion

1930–35; <Latin undec(im) eleven (ūn(us) one + -decim, combining form of decemten) + -illion, as in million

OTHER WORDS FROM undecillion

un·de·cil·lionth, adjective, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for undecillion

  • "An undecillion is ten raised to the 36th power," Freddy sighed, fearing that he wasn't getting through to Willy.

    Master of None|Lloyd Neil Goble
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