Quaternary

Từ điển WordNet v3.1 - WordNet Dictionary

noun

last 2 million years
• Syn:
Quaternary period, 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

• Từ đồng nghĩa / Synonyms:
  fourth, 4th, quaternate, Quaternary, Quaternary period, Age of Man