- of, denoting, or formed in the third epoch of the Tertiary period, which lasted for 10 000 000 years
- the Oligocene ⇒ the Oligocene epoch or rock series
单词 | oligocene |
释义 | WordReference Random House Unabridged Dictionary of American English © 2024 Ol•i•go•cene (ol′i gō sēn′),USA pronunciation [Geol.] adj.
n.
Collins Concise English Dictionary © HarperCollins Publishers:: Oligocene /ˈɒlɪɡəʊˌsiːn
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