• (n.) A bitter principle extracted as a white crystalline substance from the calumba root.
Ca·lum'bin noun (Chemistry) A bitter principle extracted as a white crystalline substance from the calumba root. [ Written also colombin , and columbin ]
C21H24O7;an amaroid from calumba that accounts for the bitterness of the crude drug. ... (05 Mar 2000) ... 
Calumbin is a bitter principle extracted as a white crystalline substance from the calumba root.
Type: Term Pronunciation: kal′ŭm-bin Definitions: 1. An amaroid from calumba that accounts for the bitterness of the crude drug.