thoroughwort

from WordNet (r) 3.0 (2006)

thoroughwort
    n 1: perennial herb of southeastern United States having white-
         rayed flower heads; formerly used as in folk medicine [syn:
         {boneset}, {agueweed}, {thoroughwort}, {Eupatorium
         perfoliatum}]

from The Collaborative International Dictionary of English v.0.48

Thoroughwort \Thor"ough*wort`\, n.
   Same as {Boneset}.
   [1913 Webster]