| Ornithology 1. (n.) That branch of zoology which treats of the natural history of birds and their classification. 2. (n.) A treatise or book on this science. Thesaurus Entries anatomy, animal physiology, anthropology, biology, comparative anatomy, conchology, ecology, entomology, ethology, helminthology, herpetology, ichthyology, malacology, mammalogy, protozoology, taxidermy, taxonomy, zoogeography, zoography, zoology, zoonomy, zoopathology, zoophysics, zootaxy, zootomy |