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septillion

noun

sep·​til·​lion sep-ˈtil-yən How to pronounce septillion (audio)
often attributive
US : a number equal to 1 followed by 24 zeros see Table of Numbers
also, British : a number equal to 1 followed by 42 zeros see Table of Numbers

Example Sentences

Recent Examples on the Web Authorities say the match Parabon Labs identified had a 1 in 65 septillion odds of being inaccurate. Grace Kahng, ABC News, 16 Sep. 2021 By comparison, the pressure inside a neutron star is in the septillions of gigapascals, so these liquid cases likely occur in nature around the universe. Caroline Delbert, Popular Mechanics, 9 Dec. 2019 The number of possible routes adds up to around 15 septillion (trillion trillion), according to Goldman Sachs, an investment bank. The Economist, 28 Mar. 2018

Word History

Etymology

French, from Latin septem + French -illion (as in million) — more at seven

First Known Use

1690, in the meaning defined above

Time Traveler
The first known use of septillion was in 1690

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