Designating, or pertaining to, the next to the last period of the Cenozoic era.

【地】上新世的。

The Pliocene period, just preceding the Pleistocene; the age of man: the last period in the age formerly called Tertiary.

【地】最新世；上新世(地质上第三纪的最后时期)。

Same as Pleiocene.

亦可作 Pleiocene。