n.
Pronunciation: ' p ā -l ē - ə - ˌ j ē n, esp Brit ' pa-
Function: adjective
Etymology: German Paläogen, from palä- pale- + -gen (fr. Greek -gen ē s born) ― more at -GEN
Date: 1882
: 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