- 1. a. Of or pertaining to the middle division of the Tertiary. Source: opted
- 2. n. The Miocene period. See Chart of Geology. Source: opted
- 3. Of or pertaining to the middle division of the Tertiary. -- n. The Miocene period. See Chart of Geology. Source: webster
- 4. Of or pertaining to the middle division of the Tertiary.-- n. Source: adambom
- 5. n. from 25 million to 13 million years ago; appearance of grazing mammals Source: ecdict
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miocene
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