femtometer

noun
fem·​to·​me·​ter | \ ˈfem(p)-tə-ˌmē-tər How to pronounce femtometer (audio) , -tō-\

Definition of femtometer

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

First Known Use of femtometer

1971, in the meaning defined above

History and Etymology for femtometer

femto- + meter entry 3

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Dictionary Entries near femtometer

femoro-

femorotibial index

femto-

femtometer

femtosecond

femur

fen

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The first known use of femtometer was in 1971

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