(n.) A neutral organic substance found in the root of the elecampane (Inula helenium), and extracted as a white crystalline or oily material, with a slightly bitter taste.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). helenin. Retrieved September 23, 2026, from http://smartdefine.org/helenin/definitions/2015674 |
| Chicago | Webster's. 2011. "helenin" http://smartdefine.org/helenin/definitions/2015674 (accessed September 23, 2026). |
| Harvard | Webster's 2011, helenin, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/helenin/definitions/2015674>. |
| MLA | Webster's. "helenin" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/helenin/definitions/2015674> |