Oligocene

名词 oligocene:

1. from 40 million to 25 million years ago; appearance of sabertoothed cats
   同义词：Oligocene epoch

Ol.i.go.cene

adj.（形容词）
Of, relating to, or being the geologic time and deposits of the epoch in the Tertiary Period of the Cenozoic Era that extended from the Eocene Epoch to the Miocene Epoch.See table at geologic time
渐新世的：新生代第三纪的，从始新世到中新世的地质年代的或沉积物的或与之相关的参见 geologic time
n.（名词）
The Oligocene Epoch.
渐新世
The deposits of the Oligocene Epoch.
渐新统：渐新世的沉积物