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epoch

noun
/ˈiːpɒk/UK/ˈɛp.ək/US

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.

  1. derived from ἐποχή
  2. borrowed from epocha

Definitions

  1. A particular period of history, or of a person's life, especially one considered…

    A particular period of history, or of a person's life, especially one considered noteworthy or remarkable.

    • And it occasionally happens that a period in which one had, hitherto, been mainly looking for the coming to birth of new things, suddenly reveals itself as an epoch of fading and decay.

  2. A notable event which marks the beginning of such a period.

  3. A specific instant in time, chosen as the point of reference or zero value of a system…

    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
    • Appendix A gives formulae for the calculation of the orbital elements of the planets at any time referred to the mean ecliptic and equinox of the epoch of noon on 1st January 2000; this is called the J2000 epoch.
  4. ›+ 4 more definitions

    1. A geochronologic unit of hundreds of thousands to millions of years

      A geochronologic unit of hundreds of thousands to millions of years; a subdivision of a period, and subdivided into ages (or sometimes subepochs).

      • Now during the time of the glacial epoch the greatest distance of the sun in winter was 98¼ millions of miles, whereas it is now, in winter, only 91½ millions of miles, the mean distance being taken as 93 million miles.

    2. One complete presentation of the training data set to an iterative machine learning…

      One complete presentation of the training data set to an iterative machine learning algorithm.

      • The neural network was trained over 500 epochs.
      • For now, let's test and evaluate our GAN by comparing the results from the first epoch with the generated images from the last epoch.

    3. To divide (data) into segments by time period.

      • The continuous data were epoched into segments of 1500 ms (starting 500 ms before visual stimulus onset), time-locked to stimulus onset (0 ms) and sorted according to experimental conditions.

    4. An intensive chemotherapy regimen for treating aggressive non-Hodgkin lymphoma,…

      An intensive chemotherapy regimen for treating aggressive non-Hodgkin lymphoma, consisting of etoposide, prednisolone, Oncovin (vincristine), cyclophosphamide, and hydroxydaunorubicin.

The neighborhood

Derived

Amazonian epoch, Belle Époque, epochful, epochism, epochmaking, epoch-making, epochwise, Genesee epoch, habitable epoch, Hesperian epoch, Noachian epoch, Planck epoch

Vish — recursive loop

No curated loop yet for epoch. Loops are being traced one word at a time while the ingestion pipeline matures.

sense glosses and etymology drawn from English Wiktionary · source · CC-BY-SA