Century Dictionary and Cyclopedia
- A subclass or an order of Aves, of Jurassic age, based upon the genus Archæopteryx, having a long lacertilian tail of many separate bones without a pygostyle and with the feathers arranged in pairs on each side of it, the sternum carinate, the wings functionally developed, and teeth present; the lizard-tailed birds. Also called Saurornithes, and, by Owen, Uroioni.
GNU Webster's 1913
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