Paleogene

adjective Pa·leo·gene \ˈpā-lē-ə-ˌjēn, especially British ˈpa-\

Definition of PALEOGENE

: of, relating to, or being the earlier part of the Tertiary including the Paleocene, Eocene, and Oligocene or the corresponding series of rocks

— Paleogene noun

German Paläogen, from palä- pale- + -gen (from Greek -genēs born) — more at -gen

First Known Use: 1882

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