Word.ws English Dictionary

femtometer

femtometer is the US spelling of femtometre.

Meaning of femtometre

Noun

femtometre (plural femtometres)

  1. An SI unit of length equal to 10⁻¹⁵ metres. Symbol: fm
    • Holonyms: picometre < nanometre < micrometre < millimetre < centimetre < decimetre < metre < kilometre < megametre < gigametre < terametre < petametre < exametre < zettametre < yottametre < ronnametre < quettametre

Forms of femtometer

pluralfemtometers

Origin of femtometer

From femto- + meter.

Questions about femtometer

What is femtometer the US spelling of?
Femtometer is the US spelling of femtometre.

Words near femtometer in the dictionary

  1. femtolitre
  2. femtolitres
  3. femtomachine
  4. femtomachines
  5. femtomagnetism
  6. femtometer
  7. femtometers
  8. femtometre
  9. femtometres
  10. femtometric
  11. femtomolar

Source and license

Adapted from Wiktionary: femtometer (page history and authors); femtometre (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: “femtometer.” Word.ws, https://word.ws/femtometer. Based on Wiktionary, CC BY-SA 4.0.