epocha

Noun

epoch (plural epochs)

1. A particular period of history, or of a person's life, especially one considered noteworthy or remarkable.
   • I grew bitter in my words—I believed the worst of everyone; nay, I sometimes doubted the affection of my kind, my indulgent parents. But let me hastily pass over this vain and profitless epoch,—the fierce tempest, and the weary calm, were but the appointed means by which I reached the harbour of...1834, L[etitia] E[lizabeth] L[andon], chapter XVII, in Francesca Carrara. […], volume I, London: Richard Bentley, […], (successor to Henry Colburn), →OCLC, page 198

   Synonyms:

   age, era

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 that involves identifying instants of time.
   • UNIX epoch; J2000 epoch
4. 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.1881, Alfred Russel Wallace, chapter VIII, in Island Life
5. (machine learning) One complete presentation of the training data set to an iterative machine learning algorithm.
   • The neural network was trained over 500 epochs.

   Synonyms:

   generation

See all 7 meanings of epoch