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 epoch epoch

noun

  • () a period marked by distinctive character or reckoned from a fixed point or event  ( epoch, era )
    a period marked by distinctive character or reckoned from a fixed point or event
  • a unit of geological time that is a subdivision of a period and is itself divided into ages  ( epoch )
    a unit of geological time that is a subdivision of a period and is itself divided into ages
  • (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded  ( date of reference, epoch )
    (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded