femtosecond

noun
fem·​to·​sec·​ond | \ˈfem(p)-tə-ˌse-kənd, -kənt, -tō-\

Definition of femtosecond 

: one quadrillionth of a second

Examples of femtosecond in a Sentence

Recent Examples on the Web

The Non-Lethal Laser-Induced Plasma Effect (NL-LIPE) system can be used to manipulate air molecules, creating a ball of plasma that oscillates to create sound waves with a stream of femtosecond-long laser bursts. Sean Gallagher, Ars Technica, "Non-Lethal Weapon: DOD seeks to use lasers to create shouting will-o-the-wisp," 22 Mar. 2018 Ytterbium is highly stable, so ytterbium atomic clocks are accurate past the nanosecond scale, all the way to the picosecond and femtosecond scale (1/1,000,000,000,000,000th of a second). Avery Thompson, Popular Mechanics, "Here Is the World's Most Stable Atomic Clock," 28 Nov. 2016 Measuring them requires equipment capable of discriminating between femtoseconds. The Economist, "Submarine cables could be repurposed as earthquake detectors," 16 June 2018 Within 30 femtoseconds – millionths of a billionth of a second – the molecule lost more than 50 electrons, far more than expected. Fox News, "Scientists create 'molecular black hole' in laboratory using world's most powerful x-ray beam," 5 June 2017 Computational approaches to protein structure focused on cunning algorithms, rather than on attempting to track atoms femtosecond by femtosecond. Oliver Morton, WIRED, "Gene Machine," 1 July 2001

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'femtosecond.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of femtosecond

1976, in the meaning defined above

Keep scrolling for more

Learn More about femtosecond

Share femtosecond

Dictionary Entries near femtosecond

femorotibial index

femto-

femtometer

femtosecond

femur

fen

Fen

Statistics for femtosecond

Look-up Popularity

Time Traveler for femtosecond

The first known use of femtosecond was in 1976

See more words from the same year

More from Merriam-Webster on femtosecond

Rhyming Dictionary: Words that rhyme with femtosecond

Comments on femtosecond

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

WORD OF THE DAY

a typical or ideal example

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
True or False

Test your knowledge - and maybe learn something along the way.

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!