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Webster 1913 Edition

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.