Any of several plants having a root formerly used as a treatment for rheumatism; specifically the twin-leaf, Jeffersonia diphylla, and the wild yam, Dioscorea villosa.
Origin
Mid 19th century.
Definition of rheumatism root in US English:
rheumatism root
noun
North American
Any of several plants having a root formerly used as a treatment for rheumatism; specifically the twin-leaf, Jeffersonia diphylla, and the wild yam, Dioscorea villosa.