Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

undecillion

play
noun, often attributive un·de·cil·lion \ˌən-di-ˈsil-yən\

Definition of undecillion

  1. — see number table



Origin and Etymology of undecillion

Latin undecim eleven (from unus one + decem ten) + English -illion (as in million) — more at one, ten


First Known Use: 1931


Seen and Heard

What made you want to look up undecillion? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

of or relating to the heavens

Get Word of the Day daily email!