archaeornithes

from WordNet (r) 3.0 (2006)

Archaeornithes
    n 1: primitive reptile-like fossil birds of the Jurassic or
         early Cretaceous [syn: {Archaeornithes}, {subclass
         Archaeornithes}]

from The Collaborative International Dictionary of English v.0.48

Archaeornithes \Archaeornithes\ n.
   1. 1 a subclass of primitive reptilelike fossil birds of the
      Jurassic or early Cretaceous.

   Syn: subclass Archaeornithes
        [WordNet 1.5]

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