ORNITHOLOGY

ornithology. Ornithology, n. the science or a description of mountains

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Or′ni‐thol″o‐gy (?), n. [[Ornitho- + -logy: cf. F. ornithologie.]] 1. 1. That branch of zoölogy which treats of the natural history of birds and their classification.
2. 2. A treatise or book on this science.