femtometer

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noun fem·to·me·ter \ˈfem(p)-tə-ˌmē-tər, -tō-\

Definition of femtometer

  1. :  a unit of length equal to 10−15 meters :  one quadrillionth of a meter

Origin and Etymology of femtometer

femto- + 3meter


First Known Use: 1971


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