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.humic substance generic term
Vogais: ui
Consoantes: hmn
hemin, human, hin, hum, haemin, hem in, hemina, hominy, humane, hanuman.