noun
- Primitive reptile-like fossil birds of the Jurassic or early Cretaceous.
- synonyms: subclass Archaeornithes
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). archaeornithes. Retrieved September 22, 2026, from http://smartdefine.org/archaeornithes/definitions/1195119 |
| Chicago | WordNet. 2010. "archaeornithes" http://smartdefine.org/archaeornithes/definitions/1195119 (accessed September 22, 2026). |
| Harvard | WordNet 2010, archaeornithes, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/archaeornithes/definitions/1195119>. |
| MLA | WordNet. "archaeornithes" 23 October 2010. Web. 22 September 2026. <http://smartdefine.org/archaeornithes/definitions/1195119> |