The Collaborative International Dictionary
Rumicin
Rumicin \Ru"mi*cin\, n. (Chem.) A yellow crystalline substance found in the root of yellow dock ( Rumex crispus) and identical with chrysophanic acid.
Wiktionary
rumicin
n. (context organic compound English) A yellow crystalline substance found in the root of yellow dock (''Rumex crispus'') and identical with chrysophanic acid.