Oligocene

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Oligocene \Ol"i*go*cene\, a. [Oligo- + Gr. ? new, recent.]
     (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}.


     [1913 Webster] Oligochaeta

From WordNet (r) 2.0 [wn]:

  Oligocene
       n : from 40 million to 25 million years ago; appearance of
           sabertoothed cats [syn: {Oligocene epoch}]