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Definitions of oligocene
  1. noun
    from 40 million to 25 million years ago; appearance of sabertoothed cats

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Definition that contains oligocene
  • genus hamamelidanthum genus of fossil plants of the Oligocene having flowers resembling those of the witch hazel; found in Baltic region
  • sabertooth any of many extinct cats of the Old and New Worlds having long swordlike upper canine teeth; from the Oligocene through the Pleistocene
  • hamamelidanthum genus of fossil plants of the Oligocene having flowers resembling those of the witch hazel; found in Baltic region
  • mesohippus North American three-toed Oligocene animal; probably not directly ancestral to modern horses
  • saber-toothed tiger any of many extinct cats of the Old and New Worlds having long swordlike upper canine teeth; from the Oligocene through the Pleistocene
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