1. Eocene epoch

noun. From 58 million to 40 million years ago; presence of modern mammals.
Synonyms
Tertiary Eocene Tertiary period
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2. epoch-making

adjective. Highly significant or important especially bringing about or marking the beginning of a new development or era.
Synonyms
epochal important significant
Antonyms
insignificant unimportance unimportant inessential

3. Eocene

noun. From 58 million to 40 million years ago; presence of modern mammals.
Synonyms
Eocene epoch Tertiary Tertiary period

4. epoch

noun. (ˈɛpək, ˈiːpək) A period marked by distinctive character or reckoned from a fixed point or event.
Synonyms
historic period period of time era day period modern era time period age
Antonyms
night time off uptime beginning middle
Etymology
epoch (English)
epocha (Latin)
ἐποχή (Ancient Greek (to 1453))
ἐπέχειν (Ancient Greek (to 1453))
ἐπέχω (Ancient Greek (to 1453))

5. epoch

noun. (ˈɛpək, ˈiːpək) (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded.
Synonyms
date date of reference
Antonyms
oldness youngness young
Etymology
epoch (English)
epocha (Latin)
ἐποχή (Ancient Greek (to 1453))
ἐπέχειν (Ancient Greek (to 1453))
ἐπέχω (Ancient Greek (to 1453))

6. epoch

noun. (ˈɛpək, ˈiːpək) A unit of geological time that is a subdivision of a period and is itself divided into ages.
Synonyms
geological period period geologic time geological time
Antonyms
overtime work time downtime regulation time day
Etymology
epoch (English)
epocha (Latin)
ἐποχή (Ancient Greek (to 1453))
ἐπέχειν (Ancient Greek (to 1453))
ἐπέχω (Ancient Greek (to 1453))
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