oligocene

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Definitions from WordNet

Noun oligocene has 1 sense

Oligocene, Oligocene epoch - from 40 million to 25 million years ago; appearance of sabertoothed cats
--₁ is a kind of epoch
--₁ is a part of Tertiary, Tertiary period

Definitions from the Web

Oligocene

Noun:

The Oligocene is a geologic epoch that lasted from approximately 33.9 to 23 million years ago, during which the first grasses appeared.

Example sentence:

The fossils found in this area indicate that it dates back to the Oligocene era.

Adjective:

Oligocene refers to or is characteristic of the third epoch of the Tertiary period, known for its cooler climate and the rise of mammals.

Example sentence:

The Oligocene climate was significantly cooler than that of the preceding Eocene epoch.

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