- (n.) That branch of zoology which treats of the natural history of birds and their classification.
- (n.) A treatise or book on this science.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). ornithology. Retrieved September 27, 2026, from http://smartdefine.org/ornithology/definitions/2039496 |
| Chicago | Webster's. 2011. "ornithology" http://smartdefine.org/ornithology/definitions/2039496 (accessed September 27, 2026). |
| Harvard | Webster's 2011, ornithology, Smart Define, viewed 27 September, 2026, <http://smartdefine.org/ornithology/definitions/2039496>. |
| MLA | Webster's. "ornithology" 27 May 2011. Web. 27 September 2026. <http://smartdefine.org/ornithology/definitions/2039496> |