ulmin

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]
    
from The Collaborative International Dictionary of English v.0.48
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]
    

[email protected]