Dictionary.com

Paleogene

[ pey-lee-uh-jeen; especially British pal-ee- ]
/ ˈpeɪ li əˌdʒin; especially British ˈpæl i- /
Geology
Save This Word!

adjective
noting or pertaining to the earlier part of the Cenozoic Era, in the system adopted by some geologists, occurring from 65 to 25 million years ago and including the Oligocene, Eocene, and Paleocene epochs: corresponds to the earlier part of the Tertiary Period in the system generally used in the U.S.Compare Neogene.
noun
the Paleogene Period or System.
QUIZ
SHALL WE PLAY A "SHALL" VS. "SHOULD" CHALLENGE?
Should you take this quiz on “shall” versus “should”? It should prove to be a quick challenge!
Question 1 of 6
Which form is used to state an obligation or duty someone has?

Origin of Paleogene

1880–85; <German Paläogen, equivalent to paläo-paleo- + -gen (<Greek genésthai to be born); cf. -gen
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use Paleogene in a sentence

  • Above the boundary lay rocks of the Paleogene, which contain none of these creatures, but mark the beginning of the Age of Mammals, in which furry animals emerged to become the largest animals on land and in the seas.

Scientific definitions for Paleogene

Paleogene
[ pālē-ə-jēn′ ]

The oldest of two subdivisions of the Tertiary Period, including the Paleocene, Eocene, and Oligocene Epochs.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
FEEDBACK