Undecillion definition

undĭ-sĭlyən
The cardinal number equal to 1036 .
noun
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(chiefly british) The cardinal number equal to 1066 .
noun
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Origin of undecillion

  • Latin undecim, ūndecim (ūnus one oi-no- in Indo-European roots) (decem ten dekm̥ in Indo-European roots) (m)illion

    From American Heritage Dictionary of the English Language, 5th Edition