femtosecond

From femto- +‎ second.

femtosecond (plural femtoseconds)

1. (metrology) An SI unit of time equal to 10⁻¹⁵ seconds. Symbol: fs
   • 2012, Mark Cendrowski, The Big Bang Theory, Season 5, Episode 18, "The Werewolf Transformation":

     Sheldon Cooper: My hair is growing at the rate of 4.6 yoctometers per femtosecond.

   • 2017, D. E. Rivas, A. Borot, D. E. Cardenas, G. Marcus, X. Gu, D. Herrmann, J. Xu, J. Tan, D. Kormin, G. Ma, W. Dallari, G. D. Tsakiris, I. B. Földes, S.-w. Chou, M. Weidman, B. Bergues, T. Wittmann, H. Schröder, P. Tzallas, D. Charalambidis, O. Razskazovskaya, V. Pervak, F. Krausz, L. Veisz, “Next Generation Driver for Attosecond and Laser-plasma Physics”, in Scientific Reports, volume 7, →DOI:

     The observation and manipulation of electron dynamics in matter call for attosecond light pulses, routinely available from high-order harmonic generation driven by few-femtosecond lasers.

• “femtosecond”, in OneLook Dictionary Search.