Dictionary.com
Thesaurus.com

zeptosecond

American  
[zep-tuh-sek-uhnd] / ˈzɛp təˌsɛk ənd /

noun

  1. one sextillionth (10-21 ) of a second. zsec, zs

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

They have been measured to the millimeter, timed to the zeptosecond and asked what kind of forest animal they would be.

From Washington Post • Apr. 28, 2021

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.