Cretaceous

Từ điển WordNet v3.1 - WordNet Dictionary

I - noun

from 135 million to 63 million years ago;
end of the age of reptiles;
appearance of modern insects and flowering plants
• Syn:
Cretaceous period
• Instance Hypernyms:
period, geological period
• Part Holonyms:
Mesozoic, Mesozoic era, Age of Reptiles

II - adjective

of or relating to or denoting the third period of the Mesozoic era

• Từ đồng nghĩa / Synonyms:
  Cretaceous, Cretaceous period