English dictionary
humin
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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a black humic substance that is not soluble in water
Source: WordNet 3.0
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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 <i>humic acid</i>, <i>ulmin</i>, <i>gein</i>, <i>ulmic</i> or <i>geic acid</i>, etc.
Source: webster1913