noun
- A slight rounded elevation where the malleus attaches to the eardrum. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). umbo. Retrieved September 20, 2026, from http://smartdefine.org/umbo/definitions/1212429 |
| Chicago | WordNet. 2010. "umbo" http://smartdefine.org/umbo/definitions/1212429 (accessed September 20, 2026). |
| Harvard | WordNet 2010, umbo, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/umbo/definitions/1212429>. |
| MLA | WordNet. "umbo" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/umbo/definitions/1212429> |