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undecillion

[ uhn-di-sil-yuhn ]

noun

, plural un·de·cil·lions, (as after a numeral) un·de·cil·lion.
  1. 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

  1. amounting to one undecillion in number.

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Other Words From

  • unde·cillionth adjective noun

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Word History and Origins

Origin of undecillion1

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

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Example Sentences

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

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