septillion
[ sep-til-yuhn ]
noun,plural sep·til·lions, (as after a numeral) sep·til·lion.
a cardinal number represented in the U.S. by 1 followed by 24 zeros, and in Great Britain by 1 followed by 42 zeros.
adjective
amounting to one septillion in number.
Origin of septillion
1Other words from septillion
- sep·til·lionth, noun, adjective
Words Nearby septillion
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
British Dictionary definitions for septillion
septillion
/ (sɛpˈtɪljən) /
nounplural -lions or -lion
(in Britain, France, and Germany) the number represented as one followed by 42 zeros (10 42)
(in the US and Canada) the number represented as one followed by 24 zeros (10 24): Brit word: quadrillion
Origin of septillion
1C17: from French, from sept seven + -illion, on the model of million
Derived forms of septillion
- septillionth, adjective, noun
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
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