OLIGOCENE
Oligocene, Oligocene epoch
(noun) from 40 million to 25 million years ago; appearance of sabertoothed cats
Source: WordNet® 3.1
Etymology
Adjective
Oligocene (not comparable)
(geology) Of a geologic epoch within the Paleogene period from about 34 to 23 million years ago; marked by the rapid evolution in a warm climate.
Proper noun
Oligocene
(geology) The Oligocene epoch.
Anagrams
• oleogenic
Source: Wiktionary
Ol"i*go*cene, a. Etym: [Oligo- + Gr. (Geol.)
Definition: Of, pertaining to, or designating, certain strata which occupy
an intermediate position between the Eocene and Miocene periods.
– n.
Definition: The Oligocene period. See the Chart of Geology.
Source: Webster’s Unabridged Dictionary 1913 Edition