Miocene adjective & noun. ['mʌɪǝsi:n] M19.
[Irreg. from Greek meiōn less + kainos new, recent (as containing remains of fewer modern species than the Pliocene).]
Geology.
A. adjective. Designating or pertaining to the fourth epoch of the Tertiary period or sub-era, after the Oligocene and before the Pliocene. M19.
b. noun. The Miocene epoch; the series of rocks dating from this time, containing fossil evidence of numerous mammals and the first hominids. M19.

■ Mio'cenic adjective M19.

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