Definify.com
Webster 1913 Edition
Eocene
E′o-cene
,Adj.
[Gr.
ἠώσ
daybreak, dawn + [GREEK] new, recent.] (Geol.)
Pertaining to the first in time of the three subdivisions into which the Tertiary formation is divided by geologists, and alluding to the approximation in its life to that of the present era;
– as,
. Eocene
depositsNoun.
The Eocene formation.
Lyell.