- (n.) The science, doctrine or demonstration of causes; especially, the investigation of the causes of any disease; the science of the origin and development of things.
- (n.) The assignment of a cause.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). aetiology. Retrieved September 26, 2026, from http://smartdefine.org/aetiology/definitions/1971440 |
| Chicago | Webster's. 2011. "aetiology" http://smartdefine.org/aetiology/definitions/1971440 (accessed September 26, 2026). |
| Harvard | Webster's 2011, aetiology, Smart Define, viewed 26 September, 2026, <http://smartdefine.org/aetiology/definitions/1971440>. |
| MLA | Webster's. "aetiology" 27 May 2011. Web. 26 September 2026. <http://smartdefine.org/aetiology/definitions/1971440> |