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What is "quadrillion"

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quadrillion
Longman Dictionary of Contemporary English
quadrillion
number
EXAMPLES FROM CORPUS
▪ Sophisticated analysis today can identify traces of pesticides and other substances down to a level of parts per quadrillion.
▪ To do this systematically would require a computer to examine a quadrillion possibilities.
▪ What are the prospects on the Caricom market for another quadrillion metric tons of sweet potatoes, eh?
The Collaborative International Dictionary
Quadrillion

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.

Douglas Harper's Etymology Dictionary
quadrillion

1670s, from French quadrillion (16c.) from quadri- "four" (see quadri-) + (m)illion. Compare 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).

Wiktionary
quadrillion

n. (context figuratively slang English) Any very large number, exceeding normal description. num. 1 (context US modern British and Australian http://en.wikipedia.org/wiki/Long%20and%20short%20scales English) A thousand trillion: 1 followed by fifteen zeros, 1015. 2 (context dated UK Australia http://en.wikipedia.org/wiki/Long%20and%20short%20scales English) A million trillion: 1 followed by twenty-four zeros, 1024.

WordNet
quadrillion

  1. n. 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

Wikipedia
Quadrillion

Quadrillion may mean either of the two numbers (see long and short scales for more detail):

  • 1,000,000,000,000,000 (one thousand million million; 10; SI prefix peta-) for all short scale countries
  • 1,000,000,000,000,000,000,000,000 (one million million million million; 10; SI prefix: yotta-) for all long scale countries

Usage examples of "quadrillion".

Now, that uncertain possibility had to be weighed against life-forms by the quadrillion, right in front of their noses.

I know that I will finally be reconciled, that I, too, will finish my quadrillion and be let in on the secret.

Their velocity was six hundred and sixty quadrillion miles per second!

As it hit, it made a sound of a pitch never before heard on earth: a deep, sustained, continuing spat of chemical bonds by the quadrillion snapping in metal.

It could also be eighteen billion trillion quadrillion quintillion whatever-you-like years ago.

Every human body consists of about 10 quadrillion cells, but about 100 quadrillion bacterial cells.

The Invader, standing there on the corner is more real than the President five quadrillion miles away.

All the quadrillions of human beings throughout the Galaxy had originated on Earth.

Within it, quadrillions of quadrillions of positrons came into being and vanished in millionths of a second.

I wish to reduce the misery of the quadrillions who now live in the Empire.

None of the quadrillions living now among all the stars of the Galaxy will be living a century from now.

Intellectually, the libraries and active mental configurations of the Sophotech segment of the population embodied uncountable quadrillions of units of information, infinitesimal processing times and nonsequential semantic and symbolic arrangements no human mind, no matter how augmented, could understand.

Right now they can run quadrillions of parallelthat is to say, simultaneousoperations.

In the firmament high above them, quadrillions of chipmold spores formed a barely visible cirrostratus cloud made wavy by the steady nibbling of the subtropical jet stream.

Civilizations, countless quadrillions of people, their greatness, their thoughts and ideas and achievements .