Eocene
['i:əusi:n]
Definition
(noun.) from 58 million to 40 million years ago; presence of modern mammals.
Inputed by Anna--From WordNet
Definition
(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.
(n.) The Eocene formation.
Checker: Williams
Definition
adj. (geol.) first in time of the three subdivisions of the Tertiary formation.
Editor: Shanna
Examples
- In the same order or family to-day, the brain is usually from six to ten times what it was in the Eocene ancestor. H. G. Wells. The Outline of History_Being a Plain History of Life and Mankind.
- We find fossils in the Eocene of monkeys and lemurs, but of one particular creature we have as yet not a single bone. H. G. Wells. The Outline of History_Being a Plain History of Life and Mankind.
- In the forests and following the grass over the Eocene plains there appeared for the first time a variety and abundance of mammals. H. G. Wells. The Outline of History_Being a Plain History of Life and Mankind.
- A number of types of mammal already appear in the Eocene. H. G. Wells. The Outline of History_Being a Plain History of Life and Mankind.
Editor: Upton