noun, often attributive
de·​cil·​lion | \ di-ˈsil-yən How to pronounce decillion (audio) \

Definition of decillion

US : a number equal to 1 followed by 33 zeros — see Table of Numbers also, British : a number equal to 1 followed by 60 zeros — see Table of Numbers

Examples of decillion in a Sentence

Recent Examples on the Web Solving it would take 1.2 decillion moves (the number 1 followed by 33 digits). A.j. Jacobs, The Atlantic, 24 Apr. 2022 The scientists found that a proton’s building block, known as a quark, faces a pressure of 100 decillion Pascal near the center of a proton. David Grossman, Popular Mechanics, 17 May 2018 Physics theories suggest that sometime between 10^34 (1 decillion) and 10^64 (1 vigintillion) years from now, the protons found in the nuclei of all atoms will decay. NBC News, 20 Dec. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'decillion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of decillion

1844, in the meaning defined above

History and Etymology for decillion

Latin decem + English -illion (as in million)

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The first known use of decillion was in 1844

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Cite this Entry

“Decillion.” Dictionary, Merriam-Webster, Accessed 12 Aug. 2022.

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