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quintillion

[kwin-til-yuh n] /kwɪnˈtɪl yən/
noun, plural quintillions (as after a numeral) quintillion.
1.
a cardinal number represented in the U.S. by 1 followed by 18 zeros, and in Great Britain by 1 followed by 30 zeros.
adjective
2.
amounting to one quintillion in number.
Origin
1665-1675
1665-75; < Latin quīnt(us) fifth + -illion (as in million)
Related forms
quintillionth, noun, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for quintillion

quintillion

/kwɪnˈtɪljən/
noun (pl) -lions, -lion
1.
(in Britain, France, and Germany) the number represented as one followed by 30 zeros (1030) US and Canadian word nonillion
2.
(in the US and Canada) the number represented as one followed by 18 zeros (1018) Former Brit word trillion
Derived Forms
quintillionth, adjective
Word Origin
C17: from Latin quintus fifth + -illion, as in 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
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Word Origin and History for quintillion
n.

1670s, from Latin quintus "the fifth" (see quinque-) + ending from million. Cf. billion. In Great Britain, the fifth power of a million (1 followed by 30 zeroes); in U.S. the sixth power of a thousand (1 followed by 18 zeroes).

Online Etymology Dictionary, © 2010 Douglas Harper
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quintillion in Technology


10^30 in Europe (this is called a nonillion in the United States and Canada).
10^18 in the United States and Canada (this is called a trillion in Europe).
[Collins dictionary].

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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