epoch
UK /ˈiːpɒk/ · US /ˈɛp.ək/ noun, verb
Forms epochs epoching epoched epocha
- 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. “UNIX epoch; J2000 epoch”
- 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. “The neural network was trained over 500 epochs.”
- 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.
Synonyms
Etymology
From Medieval Latin epocha, from Ancient Greek ἐποχή (epokhḗ, “a check, cessation, stop, pause, epoch of a star, i.e., the point at which it seems to halt after reaching the highest, and generally the place of a star; hence, a historical epoch”), from ἐπέχω (epékhō, “to hold in, check”), from ἐπι- (epi-, “upon”) + ἔχω (ékhō, “to have, hold”). Doublet of epoche.
Acronym, from the initial letters of the various drugs.
Webster’s 1913
- noun A fixed point of time, established in history by the occurrence of some grand or remarkable event; a point of time marked by an event of great subsequent influence; as, the epoch of the creation; the birth of Christ was the epoch which gave rise to the Christian era. In divers ages, . . . divers epochs of time were used. Usher.
- noun A period of time, longer or shorter, remarkable for events of great subsequent influence; a memorable period; as, the epoch of maritime discovery, or of the Reformation. "So vast an epoch of time." F. Harrison.
Etymology [LL. epocha, Gr. sah to overpower, Goth. sigis victory, AS. sigor, sige, G. sieg: cf. F. époque. See Scheme.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “epoch”, CC BY-SA 4.0. Details