n. [ Ornitho- + -logy: cf. F. ornithologie. ] 1. That branch of Zoology which treats of the natural history of birds and their classification. [ 1913 Webster ]
2. A treatise or book on this science. [ 1913 Webster ]
n. The paleobiology of birds. Syn. -- paleornithology. [ WordNet 1.5 ]
n. [ Paleo- + ornithology. ] The branch of paleontology which treats of fossil birds. [ 1913 Webster ]