yottasecond

== English == === Etymology === From yotta- + second. === Noun === yottasecond (plural yottaseconds) (metrology) An SI unit of time equal to 1024 seconds. Symbol: Ys. (= quadrillions of years, a hypothetical time span that is meaningless except in speculative contexts such as theoretical physics, philosophy, religion, and humorous hyperbole) Alternative form: Ys (symbol) Holonyms: ronnasecond < quettasecond Meronyms: quectosecond < rontosecond < yoctosecond < 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