petasecond

发音

/ˈpɛ.təˌsɛk.ənd/

词形变化

petaseconds 复数 petaseconds

释义与例句

n.
  1. 1.

    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

词源

From peta- + second.

来源：wiktionary