Definitions from Wiktionary (EPOCH)

▸ noun:  A particular period of history, or of a person's life, especially one considered noteworthy or remarkable.
▸ noun:  A notable event which marks the beginning of such a period.
▸ noun:  (chronology, astronomy, computing) A specific instant in time, chosen as the point of reference or zero value of a system that involves identifying instants of time.
▸ noun:  (geology) A geochronologic unit of hundreds of thousands to millions of years; a subdivision of a period, and subdivided into ages (or sometimes subepochs).
▸ noun:  (machine learning) One complete presentation of the training data set to an iterative machine learning algorithm.
▸ verb:  (sciences, transitive) To divide (data) into segments by time period.
▸ noun:  (medicine) An intensive chemotherapy regimen for treating aggressive non-Hodgkin lymphoma, consisting of etoposide, prednisolone, Oncovin (vincristine), cyclophosphamide, and hydroxydaunorubicin.
▸ Also see epoch



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