(n.) A bitter, brownish yellow, amorphous substance, extracted from vegetable mold, and also produced by the action of acids on certain sugars and carbohydrates; -- called also humic acid, ulmin, gein, ulmic or geic acid, etc.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Humin. Retrieved September 23, 2026, from http://smartdefine.org/humin/definitions/2017753 |
| Chicago | Webster's. 2011. "Humin" http://smartdefine.org/humin/definitions/2017753 (accessed September 23, 2026). |
| Harvard | Webster's 2011, Humin, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/humin/definitions/2017753>. |
| MLA | Webster's. "Humin" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/humin/definitions/2017753> |