humin

humin has 2 senses in the JumbleFix dictionary. Letters: 5.

Definitions

• n.. 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.
• n.. a black humic substance that is not soluble in water