Word

Quaternary period, n.

last 2 million years
<noun.time>

Age of Man Quaternary Quaternary period

semantic pointers

part holonym

Cenozoic, Cenozoic era, Age of Mammals

instance hypernym

period, geological period

part meronym

Holocene, Holocene epoch, Recent, Recent epoch Pleistocene, Pleistocene epoch, Glacial epoch