noun
- From 58 million to 40 million years ago; presence of modern mammals.
- synonyms: Eocene
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). eocene epoch. Retrieved September 22, 2026, from http://smartdefine.org/eocene_epoch/definitions/1273170 |
| Chicago | WordNet. 2010. "eocene epoch" http://smartdefine.org/eocene_epoch/definitions/1273170 (accessed September 22, 2026). |
| Harvard | WordNet 2010, eocene epoch, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/eocene_epoch/definitions/1273170>. |
| MLA | WordNet. "eocene epoch" 23 October 2010. Web. 22 September 2026. <http://smartdefine.org/eocene_epoch/definitions/1273170> |