ORNITHOLOGY
ornithology
(noun) the branch of zoology that studies birds
Source: WordNet® 3.1
Etymology
Noun
ornithology (countable and uncountable, plural ornithologies)
The branch of zoology that deals with the scientific study of birds.
Synonyms: birdlore, fowl-lore
Source: Wiktionary
Or`ni*thol"o*gy, n. Etym: [Ornitho- + -logy: cf. F. ornithologie.]
1. That branch of zoölogy which treats of the natural history of
birds and their classification.
2. A treatise or book on this science.
Source: Webster’s Unabridged Dictionary 1913 Edition