Sinornis(redirected from Sinornis/Cathayornis)
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|Noun||1.||Sinornis - sparrow-sized fossil bird of the Jurassic period to the Cretaceous period having a keeled breastbone and vestigial tail; found in China; considered possibly the second most primitive of all birds|
bird - warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings
genus Sinornis - a genus of fossil birds