Source : Webster's Revised Unabridged Dictionary (1913)

Boneset \Bone"set`\, n. (Bot.)
   A medicinal plant, the thoroughwort ({Eupatorium
   perfoliatum}). Its properties are diaphoretic and tonic.

Source : WordNet®

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