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Definition of Humin
1. Noun. A black humic substance that is not soluble in water.
Generic synonyms: Humic Substance
Definition of Humin
1. 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.
Medical Definition of Humin
1.