Eocene

Từ điển WordNet v3.1 - WordNet Dictionary

noun

from 58 million to 40 million years ago;
presence of modern mammals
• Syn:
Eocene epoch
• Instance Hypernyms:
epoch
• Part Holonyms:
Tertiary, Tertiary period

• Từ đồng nghĩa / Synonyms:
  Eocene, Eocene epoch