quadrillion

[ kwo-dril-yuhn ]

noun

, plural quad·ril·lions, (as after a numeral) quad·ril·lion.

1. 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

1. amounting to one quadrillion in number.

quadrillion

/ kwɒˈdrɪljən /

noun

1. (in Britain) the number represented as one followed by 24 zeros (10 ²⁴) US and Canadian wordseptillion
2. (in the US and Canada) the number represented as one followed by 15 zeros (10 ¹⁵)

determiner

1. 1. amounting to this number

      a quadrillion atoms

   2. ( as pronoun )

      a quadrillion

Derived Forms

• quadˈrillionth, adjective

Other Words From

• quad·rillionth noun adjective

Word History and Origins

Origin of quadrillion¹

1665–75; quadr- + -illion (as in million )

Word History and Origins

Origin of quadrillion¹

C17: from French quadrillon, from quadri- + -illion, on the model of million

Example Sentences

The observatory on Pluto had reported a free planet passing within two hundred quadrillion miles of the solar system.

From Project Gutenberg

"Three quadrillion times, my son," replied his father with perfect accuracy and a spirit of hourly freshness.

From Project Gutenberg

Quadrillion, kwod-ril′yun, n. a million raised to the fourth power, represented by a unit with twenty-four ciphers.

From Project Gutenberg

They give off resonance waves, each one absolutely unique; there's about one chance in a quadrillion of a duplicate pattern.

From Project Gutenberg

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

From Project Gutenberg