Definitions for: Quadrillion


[n] (in the United States and France) the number that is represented as a one followed by 15 zeros
[n] (in Britain and Germany) the number that is represented as a one followed by 24 zeros; "in England they call a septillion a quadrillion"



Webster (1913) Definition: Quad*ril"lion, n. [F., fr. L. quater four times,
akin to quattuor four, E. four; -- formed like million. See
Four, Million.]
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.

See Also: large integer


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