from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A brown amorphous substance found in decaying vegetation.
from the GNU version of the Collaborative International Dictionary of English
- n. A brown amorphous substance found in decaying vegetation. Cf. humin.
from The Century Dictionary and Cyclopedia
- n. A name given to various substances which are present in vegetable mold, peat, etc.
- n. A brown substance produced by the action of strong acids or alkalis on various organic bodies, especially by heating treacle or alcohol with strong sulphuric acid, thoroughly washing the residue with water, then triturating it with gum, and drying the mixture.
Latin ulmus an elm: compare French ulmine. (Wiktionary)