EXAMPLES | WORD ORIGIN 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. adjective amounting to one quadrillion in number. Origin of quadrillion 1665–75; quadr-
Related forms quad·ril·lionth, noun, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for quadrillion Historical Examples of quadrillion
At this rate of growth from a single cholera bacillus sixteen
quadrillion might arise in a single day. Quadrillion, kwod-ril′yun, n. a million raised to the fourth power, represented by a unit with twenty-four ciphers.
quadrillion times, my son," replied his father with perfect accuracy and a spirit of hourly freshness.
For the enormous majority of us there is no difference in this respect between a hundred and a
Their velocity was six hundred and sixty
quadrillion miles per second! British Dictionary definitions for quadrillion noun (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) determiner amounting to this number a quadrillion atoms ( as pronoun) a quadrillion Derived Forms quadrillionth, 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
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Word Origin and History for quadrillion n.
1670s, from French
quadrillion (16c.) from quadri- "four" (see quadri-) + (m)illion. Cf. billion. In Great Britain, the fourth power of a million (1 followed by 24 zeroes); in the U.S., the fifth power of a thousand (1 followed by 15 zeroes).
Online Etymology Dictionary, © 2010 Douglas Harper