undecillion

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

Definition of undecillion

  1. US :  a number equal to 1 followed by 36 zeros — see number table; also, British :  a number equal to 1 followed by 66 zeros — 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: 1844

Learn More about undecillion


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

to criticize severely

Get Word of the Day daily email!