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Pleistocene

[plahy-stuh-seen] /ˈplaɪ stəˌsin/
adjective
1.
noting or pertaining to the epoch forming the earlier half of the Quaternary Period, beginning about two million years ago and ending 10,000 years ago, characterized by widespread glacial ice and the advent of modern humans.
noun
2.
the Pleistocene Epoch or Series.
Origin
1830-1840
1830-40; < Greek pleîsto(s) most (superlative of polýs much) + -cene
Related forms
post-Pleistocene, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for post pleistocene

Pleistocene

/ˈplaɪstəˌsiːn/
adjective
1.
of, denoting, or formed in the first epoch of the Quaternary period, which lasted for about 1 600 000 years. It was characterized by extensive glaciations of the N hemisphere and the evolutionary development of man
noun
2.
the Pleistocene, the Pleistocene epoch or rock series
Word Origin
C19: from Greek pleistos most + kainos recent
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for post pleistocene

Pleistocene

adj.

"pertaining to the glacial period," 1839, coined by Lyell from Greek pleistos "most" (superlative of polys "much;" see poly-) + -cene.

Online Etymology Dictionary, © 2010 Douglas Harper
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post pleistocene in Science
Pleistocene
  (plī'stə-sēn')   
The earlier of the two epochs of the Quaternary Period, from about 2 million to 10,000 years ago. The Pleistocene Epoch was characterized by the formation of widespread glaciers in the Northern Hemisphere and by the appearance of humans. Mammals included both small forms, such as saber-toothed tigers and horses and giant ones, such as mammoths and mastodons. Almost all the giant mammals, including woolly mammoths, giant wolves, giant ground sloths, and massive wombats disappeared at the end of the Pleistocene and the start of the Holocene. See Chart at geologic time.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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