HUMIN
humin
(noun) a black humic substance that is not soluble in water
Source: WordNet® 3.1
Hu"min, n. Etym: [L. humus the earth, ground.] (Chem.)
Definition: 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 Edition
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