nonillion

[ noh-nil-yuhn ]
/ noʊˈnɪl yən /

noun, plural no·nil·lions, (as after a numeral) no·nil·lion.

a cardinal number represented in the U.S. by 1 followed by 30 zeros, and in Great Britain by 1 followed by 54 zeros.

adjective

amounting to one nonillion in number.

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Origin of nonillion

1680–90; <French, equivalent to non- (<Latin nōnus ninth) + -illion, as in millionmillion

OTHER WORDS FROM nonillion

no·nil·lionth, noun, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for nonillion

nonillion
/ (nəʊˈnɪljən) /

noun

(in Britain, France, and Germany) the number represented as one followed by 54 zeros (10 54)
(in the US and Canada) the number represented as one followed by 30 zeros (10 30)Brit word: quintillion

Derived forms of nonillion

nonillionth, adjective, noun

Word Origin for nonillion

C17: from French, from Latin nōnus ninth, on the model of million
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012