Top Definition
Relating to the earliest epoch of the Tertiary or the corresponding system of rocks; period of great development of primitive mammals.
She's as real as"-he looked around; he picked up the tiny, wedgelike skull of Barney, a 60-million-year-old Paleocene rodent, and held it up-"as real as Barney."
by Morgan T November 10, 2006
5 Words related to Paleocene

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