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Pronunciation varies by accent · noun
(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).
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
Use zettasecond when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Zettasecond means (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).
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Holonyms: yottasecond < ronnasecond < quettasecond
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