zeptosecond

noun
zep·​to·​sec·​ond | \ˈzep-tə-ˌse-kənd, -kənt\

Definition of zeptosecond 

: one sextillionth of a second

First Known Use of zeptosecond

1994, in the meaning defined above

Keep scrolling for more

Learn More about zeptosecond

Share zeptosecond

Dictionary Entries near zeptosecond

Zeppelin

zeppole

zepto-

zeptosecond

zequin

zerda

zeriba

Statistics for zeptosecond

Look-up Popularity

Time Traveler for zeptosecond

The first known use of zeptosecond was in 1994

See more words from the same year

More from Merriam-Webster on zeptosecond

Rhyming Dictionary: Words that rhyme with zeptosecond

Comments on zeptosecond

What made you want to look up zeptosecond? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

a soft lustrous wool fabric with mohair

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!