cynanchum
noun
cy·nan·chum
| \ sə̇ˈnaŋkəm\
Definition of cynanchum
1
capitalized
: a genus of twining vines (family Asclepiadaceae) with opposite hanging leaves, small greenish or purplish flowers, and long smooth pods
2
plural -s
: the roots of several vines of the genus Cynanchum formerly used as an emetic
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