Eocene

n an old order dating to early Eocene: bats: suborder Megachiroptera (fruit bats)

small order of primitive ungulates of the Paleocene and Eocene

extinct primitive dog-sized four-toed Eocene animal

A name given to the series of sandstones and schists overlying the true nummulitic formation in the Alps, and included in the Eocene Tertiary.

More recent than the Eocene, that is, including both the Miocene and Pliocene divisions of the Tertiary.