- (n.) The root of several species of Rheum, used much as a cathartic medicine.
- (n.) The name of several large perennial herbs of the genus Rheum and order Polygonaceae.
- (n.) The large and fleshy leafstalks of Rheum Rhaponticum and other species of the same genus. They are pleasantly acid, and are used in cookery. Called also pieplant.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). rhubarb. Retrieved September 23, 2026, from http://smartdefine.org/rhubarb/definitions/2055857 |
| Chicago | Webster's. 2011. "rhubarb" http://smartdefine.org/rhubarb/definitions/2055857 (accessed September 23, 2026). |
| Harvard | Webster's 2011, rhubarb, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/rhubarb/definitions/2055857>. |
| MLA | Webster's. "rhubarb" 28 May 2011. Web. 23 September 2026. <http://smartdefine.org/rhubarb/definitions/2055857> |