Miocene
/ˈmaɪəʊsiːn/adjective
1- Geology of, relating to, or denoting the fourth epoch of the Tertiary period, between the Oligocene and Pliocene epochs【地质】（与）中新世（有关）的。
1.1
- as noun the Miocene the Miocene epoch or the system of rocks deposited during it中新世; 中新世沉积岩。
The Miocene epoch lasted from 23.3 to 5.2 million years ago. During this time the Alps and Himalayas were being formed and there was diversification of the primates, including the first apes.
词源
mid 19th cent.: formed irregularly from Greek meiōn 'less' + kainos 'new'.