Word.ws English Dictionary

femtojoule

femtojoule noun: an SI unit of energy, work, and heat equal to 10⁻¹⁵ joules. Symbol: fJ.

Noun

femtojoule (plural femtojoules)

  1. An SI unit of energy, work, and heat equal to 10⁻¹⁵ joules. Symbol: fJ
    Synonyms:
    fJ

Synonyms of femtojoule

Forms of femtojoule

pluralfemtojoules

Origin of femtojoule

From femto- + joule.

Questions about femtojoule

What does femtojoule mean?
Femtojoule means an SI unit of energy, work, and heat equal to 10⁻¹⁵ joules. Symbol: fJ.
What part of speech is femtojoule?
Femtojoule is a noun.
What is the plural of femtojoule?
The plural of femtojoule is femtojoules.

Words near femtojoule in the dictionary

  1. femtohenries
  2. femtohenry
  3. femtohenrys
  4. femtoinjection
  5. femtoinjections
  6. femtojoule
  7. femtojoules
  8. femtokatal
  9. femtokatals
  10. femtolaser
  11. femtolensing

Source and license

Adapted from Wiktionary: femtojoule (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.

Last updated:

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