femtosecond

名词 n.
中文释义

英文释义

名词 n.
  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 < petasecond < giga-annum, gigayear < exasecond < zettasecond < yottasecond < ronnasecond < quettasecond

词形变化

femtoseconds plural

词源

Etymology tree
Proto-Indo-European *pénkʷe
Proto-Germanic *fimf
Proto-Indo-European *déḱm̥
Proto-Germanic *tehun
Proto-Germanic *fimftehun
Old Norse fimmtánder.
Danish femtender.
English femto-
English second
English femtosecond
From femto- + second.
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