Miocene=الميوسين

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Miocene=الميوسين

ONLINE ETYMOLOGY DICTIONARY:

Miocene (adj.)

"pertaining to the geological period between the Oligocene and Pliocene," 1831, irregular formation from Gk. meion "less" + -cene.

-cene

word-forming element in geology, introduced by Sir Charles Lyell (1797-1875), from Gk. kainos "new," cognate with L. recens (see recent).

WIKIPEDIA
The Miocene (symbol M_I^[1]) is a geological epoch of the Neogene Period and extends from about 23.03 to 5.332 million years ago (Ma). The Miocene was named by Sir Charles Lyell. Its name comes from the Greek words μείων (meiōn, “less”) and καινός (kainos, “new”) and means "less recent" because it has 18% fewer modern sea invertebrates than the Pliocene.