腐殖酸 fǔzhísuān humic acid Origin Definitions Defs Strokes Stroke Words Sentences Sents 腐 fǔ verbadjective rotten (bound form) rotten; putrid; decayed; corroded殖 zhí verbnoun to breed (bound form) to grow; to reproduce; to breed; to cultivate酸 suān noun acid acid, a chemical compound that releases hydrogen ions in water