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Mio·cene | \ ˈmī-ə-ˌsēn 
\
\Definition of Miocene
: of, relating to, or being an epoch of the Tertiary between the Pliocene and the Oligocene or the corresponding series of rocks — see Geologic Time Table
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Time Traveler for Miocene
The first known use of Miocene was in 1831
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