yoctosecond

== English == === Etymology === From yocto- + second. === Noun === yoctosecond (plural yoctoseconds) (metrology) An SI unit of time equal to 10−24 seconds. Symbol: ys Alternative form: ys (symbol) Holonyms: zeptosecond < attosecond < femtosecond < 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 < petasecond < giga-annum, gigayear < exasecond < zettasecond < yottasecond < ronnasecond < quettasecond Meronyms: quectosecond < rontosecond