Adjacent Words

quadrillion definitions

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WordNet (r) 3.0 (2005)

n
1: the number that is represented as a one followed by 24 zeros; "in England they call a septillion a quadrillion"
2: the number that is represented as a one followed by 15 zeros

Merriam Webster's

noun Etymology: French, from Middle French, from quadri- + -illion (as in million) Date: 1674 — see number table • quadrillion adjective • quadrillionth adjective or noun

Oxford Reference Dictionary

n. (pl. same or quadrillions) a thousand raised to the fifth (or formerly, esp. Brit., the eighth) power (10(15) and 10(24) respectively). Etymology: F (as QUADRI-, MILLION)

Webster's 1913 Dictionary

Quadrillion 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.

Moby Thesaurus

a billion, a crore, a lakh, a million, a myriad, a nonillion, a quadrillion, a thousand, a zillion, decillion, duodecillion, googol, googolplex, jillion, nonillion, novemdecillion, octillion, octodecillion, quattuordecillion, quindecillion, quintillion, septillion, sexdecillion, sextillion, tredecillion, trillion, undecillion, vigintillion, zillion