calumba
noun
ca·lum·ba
| \ kə-ˈləm-bə
\
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variants:
or colombo \ -(ˌ)bō
\
\
Medical Definition of calumba
: the root of an African plant (Jatrorrhiza palmata of the family Menispermaceae) that contains the bitter principle columbin and is used as a tonic
— called also calumba root, colombo root