Definition of femtoseconds

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  • femtoseconds is a valid Scrabble US word with a point value of 20
  • femtoseconds is a valid Scrabble UK word with a point value of 20
  • femtoseconds is a valid Words with friends word with a point value of 23

Definition of femtoseconds

  • one quadrillionth (10^-15) of a second; one thousandth of a picosecond (noun)

See definition of femtoseconds in Merriam Webster