Oligocene Definition
ŏlĭ-gō-sēn, ōlĭ-
adjective
Designating or of the third and last geologic epoch of the Paleogene, characterized by cold climate, the formation of vast grasslands, and the further development of mammals.
Webster's New World
noun
The Oligocene Epoch.
American Heritage
Synonyms:
- Oligocene epoch
Idioms, Phrasal Verbs Related to Oligocene
- the Oligocene
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