humin
腐黑酸; 腐黑物; 烏敏素
hu·min /ˈhjumən/ 名詞
腐黑物,胡敏素
Hu·min n. Chem. 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.
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humin
n : a black humic substance that is not soluble in water