Eocene: Meaning and Definition of
Pronunciation: (ē'u-sēn"), [key]
— Geol. Geol.
- noting or pertaining to an epoch of the Tertiary Period, occurring from 55 to 40 million years ago and characterized by the advent of the modern mammalian orders. See table under
- the Eocene Epoch or Series.
- eocene (Thesaurus)