LATIN DICTIONARYLexicon Latīnum
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“epoch” in Latin

The English word epoch itself goes back to Latin epocha.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

epoch
aera (late Latin technical term, Isid., 5, 36): *epocha (as technical term). Sometimes tempus, aetas, may serve.

Quick answer

What is the Latin word for epoch?
The usual Latin words for “epoch” are aes, epocha, tempus; also aetās. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.