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humin
From The Collaborative International Dictionary of English v.0.48:
Humin \Hu"min\, n. [L. humus the earth, ground.] (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.
[1913 Webster]
