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From The Collaborative International Dictionary of English v.0.44 [gcide]:
gein \ge"in\ (j[=e]"[i^]n), noun [Gr. gh^ earth.] (Chem.) See {Humin}.
From The Collaborative International Dictionary of English v.0.44 [gcide]:
Humin \Hu"min\, noun [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.
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