Ol·i·go·cene /ˈɑlɪgoˌsin, ˈo; əˈlɪgə-/
漸新世,漸新統(a.)漸新世的,漸新統的
Ol·i·go·cene a. Geol. Of, pertaining to, or designating, certain strata which occupy an intermediate position between the Eocene and Miocene periods. -- n. The Oligocene period. See the Chart of Geology.
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Oligocene
n : from 40 million to 25 million years ago; appearance of
sabertoothed cats [syn: Oligocene epoch]