Epoch Definition
A subdivision of a period in geologic time corresponding to the rock strata of a series.
Other Word Forms of Epoch
Noun
Origin of Epoch
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From Medieval Latin epocha, from Ancient Greek ἐποχή (epokhē, “a check, cessation, stop, pause, epoch of a star, e.g., the point at which it seems to halt after reaching the highest, and generally the place of a star; hence, a historical epoch”), from ἐπέχειν (epechein, “to hold in, check”), from ἐπί (épí, “upon”) + ἔχειν (echein, “to have, hold”).
From Wiktionary
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Medieval Latin epocha measure of time from Greek epokhē a point in time segh- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
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