(n.) A plant (Lewisia rediviva) allied to the purslane, but with fleshy, farinaceous roots, growing in the mountains of Idaho, Montana, etc. It gives the name to the Bitter Root mountains and river. The Indians call both the plant and the river Spaet'lum.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). bitterroot. Retrieved September 20, 2026, from http://smartdefine.org/bitterroot/definitions/1980644 |
| Chicago | Webster's. 2011. "bitterroot" http://smartdefine.org/bitterroot/definitions/1980644 (accessed September 20, 2026). |
| Harvard | Webster's 2011, bitterroot, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/bitterroot/definitions/1980644>. |
| MLA | Webster's. "bitterroot" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/bitterroot/definitions/1980644> |