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Từ điển Oxford Learners Wordfinder Dictionary
epoch


noun
1. a period marked by distinctive character or reckoned from a fixed point or event (Freq. 5)
Syn:
era
Derivationally related forms:
epochal
Hypernyms:
time period, period of time, period
Hyponyms:
day, historic period, age, modern era
Instance Hyponyms:
Caliphate, Christian era, Common era
2. (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded
Syn:
date of reference
Topics:
astronomy, uranology
Hypernyms:
date
3. a unit of geological time that is a subdivision of a period and is itself divided into ages
Hypernyms:
geological time, geologic time
Instance Hyponyms:
Holocene, Holocene epoch, Recent, Recent epoch, Pleistocene,
Pleistocene epoch, Glacial epoch, Pliocene, Pliocene epoch, Miocene, Miocene epoch,
Oligocene, Oligocene epoch, Eocene, Eocene epoch, Paleocene, Paleocene epoch
Part Holonyms:
period, geological period

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