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| Pa·le·o·cene [ páylee ə sn ] |
noun |
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| Definition: |
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first epoch of Tertiary period: the epoch of geologic time, 65 million to 55 million years ago, during which various types of mammals flourished
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| [Late 19th century. <paleo- + Greek kainos "new"] |
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  Pa·le·o·cene adjective |
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