saururae

from The Century Dictionary.

• 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.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Paleon.) An extinct order of birds having a long vertebrated tail with quills along each side of it. Archæopteryx is the type. See archæopteryx, and odontornithes.