Humin
Pronunciation : Hu"min
Part of Speech : n.
Etymology : [L. humus the earth, ground.] (Chem.)
Definition : Defn: 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.
Source : Webster's Unabridged Dictionary, 1913