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Epoch
01
a period of time in history or someone's life, during which significant events happen
02
a subdivision of a geologic period, characterized by distinctive and globally recognizable rock layers, fossils, and significant changes in Earth's climate and biota
03
(astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded
epoch
n
epochal
adj
epochal
adj
Example
The diachronic perspective reveals language patterns across epochs.
Each epoch in Earth's history is defined by unique climate and life forms.
Geologists study rock layers from the Cambrian epoch to learn about early life.
The Tertiary is divided into two epochs: the Paleogene and the Neogene.
The Mesozoic era includes the Triassic, Jurassic, and Cretaceous epochs.
