yoc·​to·​sec·​ond ˈyäk-tə-ˌse-kənd How to pronounce yoctosecond (audio)
: one septillionth of a second

Word History

First Known Use

1996, in the meaning defined above

Time Traveler
The first known use of yoctosecond was in 1996

Dictionary Entries Near yoctosecond

Cite this Entry

“Yoctosecond.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/yoctosecond. Accessed 17 Apr. 2024.

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