ulmin

2 definitions found

ulmin - 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]

  Ulmin \Ul"min\, n. [L. ulmus an elm: cf. F. ulmine.] (Chem.)
     A brown amorphous substance found in decaying vegetation. Cf.
     Humin. [Formerly written ulmine.]
     [1913 Webster]