An Epoch (periodization)
- Epoch (reference date), a moment in time chosen as the origin of a particular era
- Epoch (geology) or geologic epoch, a span of time smaller than a "period" and larger than an "age"
- Epoch (cosmology) or cosmologic epoch, a phase in the development of the universe since the Big Bang
- Epoch (astronomy), a moment in time used as a reference for the orbital elements of a celestial body
- Epoch (race), racial periods in Blavatsky's esoteric theory of the root races
- Epoch, a step in the training process of an artificial neural network
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Famous quotes containing the word epoch:
“The death of a dear friend, wife, brother, lover, which seemed nothing but privation, somewhat later assumes the aspect of a guide or genius; for it commonly operates revolutions in our way of life, terminates an epoch of infancy or of youth which was waiting to be closed, breaks up a wonted occupation, or a household, or style of living, and allows for the formation of new ones more friendly to the growth of character.”
—Ralph Waldo Emerson (18031882)
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