designating or of the second geologic epoch of the Paleogene, characterized by a warm climate and the development of mammals
Origin of Eoceneeo- + -cene
the Eocene Epoch or its rocks
Of, relating to, or being the epoch of geologic time from about 55 to 34 million years ago, the second epoch of the Tertiary Period. It is characterized by warm climates, the rise of most modern mammalian families, and the formation of the Himalayas. See Table at geologic time.
The Eocene Epoch.
(comparative more Eocene, superlative most Eocene)
NounSee also: Éocène
- (geology) the Eocene epoch