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2 definitions found

From Webster's Revised Unabridged Dictionary (1913) [web1913]:

  Gein \Ge"in\, n. [Gr. ? earth.] (Chem.)
     See {Humin}.

From Webster's Revised Unabridged Dictionary (1913) [web1913]:

  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.

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