noun ar·chae·or·nis \ˌärkēˈȯrnə̇s\

Definition of archaeornis

  1. 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. 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

Seen and Heard

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feeling or affected by lethargy

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