archeopteryx

Từ điển WordNet v3.1 - WordNet Dictionary

noun

extinct primitive toothed bird of the Jurassic period having a long feathered tail and hollow bones;
usually considered the most primitive of all birds
• Syn:
archaeopteryx, Archaeopteryx lithographica
• Hypernyms:
bird
• Member Holonyms:
genus Archaeopteryx, genus Archeopteryx