(n.) Any fresh-water air-breathing mollusk belonging to Planorbis and other allied genera, having shells of a discoidal form.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Planorbis. Retrieved September 20, 2026, from http://smartdefine.org/planorbis/definitions/2046151 |
| Chicago | Webster's. 2011. "Planorbis" http://smartdefine.org/planorbis/definitions/2046151 (accessed September 20, 2026). |
| Harvard | Webster's 2011, Planorbis, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/planorbis/definitions/2046151>. |
| MLA | Webster's. "Planorbis" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/planorbis/definitions/2046151> |