[ doo-oh-di-sil-yuh n, dyoo- ]
/ ˌdu oʊ dɪˈsɪl yən, ˌdyu- /

noun, plural du·o·de·cil·lions, (as after a numeral) du·o·de·cil·lion.

a cardinal number represented in the U.S. by 1 followed by 39 zeros, and in Great Britain by 1 followed by 72 zeros.


amounting to one duodecillion in number.

Origin of duodecillion

1910–15; < Latin duodec(im) twelve + -illion, as in million

OTHER WORDS FROM duodecillion

du·o·de·cil·lionth, noun, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for duodecillion

  • All the hairs on the heads of all human beings, which are supposed to be numberless, are only a small fraction of a duodecillion.