'Thoroughwort' definitions:

Definition of 'thoroughwort'

From: WordNet
noun
Perennial herb of southeastern United States having white- rayed flower heads; formerly used as in folk medicine [syn: boneset, agueweed, thoroughwort, Eupatorium perfoliatum]

Definition of 'Thoroughwort'

From: GCIDE
  • Thoroughwort \Thor"ough*wort`\, n. Same as Boneset. [1913 Webster]