English Dictionary

epoch

/ˈiːpɒk/

noun

A particular period of history, or of a person's life, especially one considered noteworthy or remarkable. / A notable event which marks the beginning of such a period.

The Renaissance was an epoch of great cultural and artistic achievements.

意味（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 faith and rest.

意味（2）

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

意味（3）

(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.

Coordinate term: (cartography, engineering) datum

意味（4）

(geology) 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.

意味（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.