1 zeptosecond | Definition of zeptosecond

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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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