zettasecond

See also: zetta-second

English

Etymology

From zetta- +‎ second.

Noun

zettasecond (plural zettaseconds)

  2. (metrology) An SI unit of time equal to 1021 seconds. Symbol: Zs. (= trillions of years, a hypothetical time span that is meaningless except in speculative contexts such as theoretical physics, philosophy, religion, and humorous hyperbole)
    Alternative form: Zs (symbol)
    Holonyms: yottasecond < 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
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