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/ˈpɛ.təˌsɛk.ənd/ · noun
(metrology) An SI unit of time equal to 10¹⁵ seconds. Symbol: Ps. (= 31 709 800 years).
Holonyms: giga-annum, gigayear < exasecond < zettasecond < 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
Use petasecond when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Petasecond means (metrology) An SI unit of time equal to 10¹⁵ seconds. Symbol: Ps. (= 31 709 800 years).
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Holonyms: giga-annum, gigayear < exasecond < zettasecond < yottasecond < ronnasecond < quettasecond
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