Word.ws English Dictionary

femtosecond

femtosecond noun: an SI unit of time equal to 10⁻¹⁵ seconds. Symbol: fs.

Noun

femtosecond (plural femtoseconds)

  1. An SI unit of time equal to 10⁻¹⁵ seconds. Symbol: fs
    • Holonyms: picosecond < nanosecond < microsecond < millisecond < centisecond < decisecond < second < decasecond < minute < hectosecond < kilosecond < hour < day < week < megasecond < fortnight < month < year < gigasecond < century < kiloannum, kiloyear, millennium < terasecond < mega-annum, megayear...
    • Meronyms: quectosecond < rontosecond < yoctosecond < zeptosecond < attosecond

Examples of femtosecond in a sentence

  • Sheldon Cooper: My hair is growing at the rate of 4.6 yoctometers per femtosecond.2012, Mark Cendrowski, The Big Bang Theory, Season 5, Episode 18, "The Werewolf Transformation"
  • The observation and manipulation of electron dynamics in matter call for attosecond light pulses, routinely available from high-order harmonic generation driven by few-femtosecond lasers.2017, D. E. Rivas, A. Borot, D. E. Cardenas, G. Marcus, X. Gu, D. Herrmann, J. Xu, J. Tan, D. Kormin, G. Ma, W. Dallari, G. D. Tsakiris, I....

Forms of femtosecond

pluralfemtoseconds

Origin of femtosecond

From femto- + second.

Words formed from femtosecond

Questions about femtosecond

What does femtosecond mean?
Femtosecond means an SI unit of time equal to 10⁻¹⁵ seconds. Symbol: fs.
How do you use femtosecond in a sentence?
Sheldon Cooper: My hair is growing at the rate of 4.6 yoctometers per femtosecond.
What part of speech is femtosecond?
Femtosecond is a noun.
What is the plural of femtosecond?
The plural of femtosecond is femtoseconds.

Words near femtosecond in the dictionary

  1. femtosatellite
  2. femtosatellites
  3. femtoscale
  4. femtoscopic
  5. femtoscopy
  6. femtosecond
  7. femtoseconds
  8. femtosiemens
  9. femtotechnological
  10. femtotechnologies
  11. femtotechnology

Source and license

Adapted from Wiktionary: femtosecond (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “femtosecond.” Word.ws, https://word.ws/femtosecond. Based on Wiktionary, CC BY-SA 4.0.