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genus protoavis is a noun meaning "extinct primitive birds of the Triassic period; 70 million years before archaeopteryx". It carries one recorded sense.
extinct primitive birds of the Triassic period; 70 million years before archaeopteryx
Definitions, synonyms and semantic relations for genus protoavis come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.