Definition of archaeornis
1 capitalized : a genus of Upper Jurassic birds (subclass Archaeornithes) having a long feathered tail, showing reptilian characteristics in the absence of a bill, presence of teeth in the jaws, and on the wings three free digits with claws
2 plural -es : a bird or fossil of the genus Archaeornis
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Origin and Etymology of archaeornis
New Latin, from archae- + -ornis
First Known Use: 1927
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