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Webster 1913 Edition
Oligocene
Ol′i-go-cene
,Adj.
[
Oligo-
+ Gr. [GREEK] new, recent.] (Geol.)
Of, pertaining to, or designating, certain strata which occupy an intermediate position between the Eocene and Miocene periods.
– Noun.
The Oligocene period. See the Chart of
Geology
.