zeptosecond

noun
zep·​to·​sec·​ond | \ ˈzep-tə-ˌse-kənd How to pronounce zeptosecond (audio) , -kənt \

Definition of zeptosecond

: one sextillionth of a second

First Known Use of zeptosecond

1994, in the meaning defined above

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The first known use of zeptosecond was in 1994

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Cite this Entry

“Zeptosecond.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/zeptosecond. Accessed 10 Apr. 2020.

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