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Noun: Oligocene  'ó-li-gow,seen or u'li-gu,seen [N. Amer], ó'li-gu,seen [Brit]
  1. A geological epoch from approximately 34 million to 23 million years ago, marked by the appearance of sabertoothed cats
    "Many modern mammal groups emerged during the Oligocene";
    - Oligocene epoch

Type of: epoch

Part of: Tertiary, Tertiary period

Encyclopedia: Oligocene