Mesozoic era

Từ điển WordNet v3.1 - WordNet Dictionary

noun

from 230 million to 63 million years ago
• Syn:
Mesozoic, Age of Reptiles
• Instance Hypernyms:
era, geological era
• Part Meronyms:
Cretaceous, Cretaceous period, Jurassic, Jurassic period, Triassic, Triassic period