Definition of rheumatism weed in English:

rheumatism weed

noun

North American
  • Any of several plants belonging to or formerly included in the genus Pyrola (family Ericaceae) and used in the treatment of rheumatism; especially the pipsissewa, Chimaphila umbellata.

Origin

Late 18th century; earliest use found in Manasseh Cutler (1742–1823).