Definition of Pliocene in English:

Pliocene

Syllabification: Pli·o·cene
Pronunciation: /ˈplīəˌsēn
 
/

adjective

Geology
1Of, relating to, or denoting the last epoch of the Tertiary period, between the Miocene and Pleistocene epochs.
More example sentences
  • The sediments recovered are of Early Pleistocene to Late Pliocene age.
  • These species are widely distributed in Upper Miocene and Pliocene deposits in tropical America, forming a morphologically distinctive group.
  • Miocene to middle Pliocene species are widely distributed in Europe, Africa, Australia, North and South America.
1.1 (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

Origin

mid 19th century: from Greek pleiōn 'more' + kainos 'new'.

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