Quaternary period

Từ điển WordNet v3.1 - WordNet Dictionary

noun

last 2 million years
• Syn:
Quaternary, Age of Man
• Instance Hypernyms:
period, geological period
• Part Holonyms:
Cenozoic, Cenozoic era, Age of Mammals
• Part Meronyms:
Holocene, Holocene epoch, Recent, Recent epoch, Pleistocene,
Pleistocene epoch, Glacial epoch