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1. (n.) quadrillion
a cardinal number represented in the U.S. by 1 followed by 15 zeros, and in Great Britain by 1 followed by 24 zeros.
2. (adj.) quadrillion
amounting to one quadrillion in number.
Etymology: (1665–75; quadr - +-illion (as in million))
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| Definition of 'quadrillion' |
Princeton's WordNet |
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1. (noun) quadrillion
the number that is represented as a one followed by 24 zeros
"in England they call a septillion a quadrillion"
2. (noun) quadrillion
the number that is represented as a one followed by 15 zeros
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| Definition of 'quadrillion' |
Webster Dictionary |
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1. (noun) quadrillion
according to the French notation, which is followed also upon the Continent and in the United States, a unit with fifteen ciphers annexed; according to the English notation, the number produced by involving a million to the fourth power, or the number represented by a unit with twenty-four ciphers annexed. See the Note under Numeration
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Definitions of quadrillion 
