2 definitions found
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Eocene \E"o*cene\, a. [Gr. ? daybreak, dawn + ? new recent.]
(Geol.)
Pertaining to the first in time of the three subdivisions
into which the Tertiary formation is divided by geologists,
and alluding to the approximation in its life to that of the
present era; as Eocene deposits. -- n. The Eocene formation.
--Lyell.
From WordNet r 1.6 [wn]:
Eocene
n : from 40 million to 58 million years ago; presence of modern
mammals [syn: {Eocene}, {Eocene epoch}]
more about eocene
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