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Pliocene

Syllabification: (Pli·o·cene)

Pronunciation: /ˈplīəˌsēn/

Definition of Pliocene

adjective

Geology

of, relating to, or denoting the last epoch of the Tertiary period, between the Miocene and Pleistocene epochs.
(as noun the Pliocene) the Pliocene epoch or the system of rocks deposited during it.

The Pliocene epoch lasted from 5.2 million to 1.64 million years ago. Temperatures were falling at this time and many mammals became extinct. The first hominids, including Australopithecus and Homo habilis, appeared