attosecond

== English == === Etymology === From atto- +‎ second. === Noun === attosecond (plural attoseconds) (metrology) An SI unit of time equal to 10−18 seconds. Symbol: as Alternative form: as (symbol) Holonyms: 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 < yoctosecond < zeptosecond ==== Translations ==== === Anagrams === cottonades