Eocene

Definition:

  • (n.) The Eocene formation.
  • (a.) 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 deposits.

Compare eocene with other words:

eocene vs. period

eocene vs. epoch

eocene vs. geologic