noun
- A hard flap serving as a cover for (a) the gill slits in fishes or (b. the opening of the shell in certain gastropods when the body is retracted).
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). operculum. Retrieved September 20, 2026, from http://smartdefine.org/operculum/definitions/1197024 |
| Chicago | WordNet. 2010. "operculum" http://smartdefine.org/operculum/definitions/1197024 (accessed September 20, 2026). |
| Harvard | WordNet 2010, operculum, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/operculum/definitions/1197024>. |
| MLA | WordNet. "operculum" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/operculum/definitions/1197024> |