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Oligocene
Ol·i·go·cene [ ólligō sn, ə líggə sn ]


noun 
Definition:
 
third geologic period of Tertiary Era: the epoch of geologic time, 38 million to 24 million years ago, during which primates first appeared

Ol·i·go·cene adjective
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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