[ kwo-dril-yuh n ]
/ kwɒˈdrɪl yən /
noun, plural quad·ril·lions, (as after a numeral) quad·ril·lion.
a cardinal number represented in the U.S. by 1 followed by 15 zeros, and in Great Britain by 1 followed by 24 zeros.
amounting to one quadrillion in number.
Origin of quadrillion
1665–75; quadr- + -illion (as in million)
Related formsquad·ril·lionth, noun, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for quadrillionth
But as this gives something like one thousand quadrillionth part of the density of water, we refuse to accept or even think of it.New Theories in Astronomy|Willam Stirling
British Dictionary definitions for quadrillionth
/ (kwɒˈdrɪljən) /
(in Britain) the number represented as one followed by 24 zeros (10 24)US and Canadian word: septillion
(in the US and Canada) the number represented as one followed by 15 zeros (10 15)
- amounting to this numbera quadrillion atoms
- (as pronoun)a quadrillion
Derived Formsquadrillionth, adjective
Word Origin for quadrillion
C17: from French quadrillon, from quadri- + -illion, 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