femtometer vs femtometre what difference

what is difference between femtometer and femtometre

English

Etymology

femto- +‎ meter

Noun

femtometer (plural femtometers)

  1. US spelling of femtometre: A length of 10-15 of a meter, 1 quadrillionth of a meter.

Anagrams

  • femtometre


English

Alternative forms

  • (US) femtometer

Etymology

femto- +‎ metre

Noun

femtometre (plural femtometres)

  1. 10-15 of a metre. Symbol: fm

Derived terms

  • femtometric

Translations

Anagrams

  • femtometer

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