fsec

Noun

femtosecond (plural femtoseconds)

1. An SI unit of time equal to 10⁻¹⁵ seconds. Symbol: fs
   • Holonyms: picosecond < nanosecond < microsecond < millisecond < centisecond < decisecond < second < decasecond < minute < hectosecond < kilosecond < hour < day < week < megasecond < fortnight < month < year < gigasecond < century < kiloannum, kiloyear, millennium < terasecond < mega-annum, megayear...