Source : Webster's Revised Unabridged Dictionary (1913)

Bloodwort \Blood"wort`\, n. (Bot.)
   A plant, {Rumex sanguineus}, or bloody-veined dock. The name
   is applied also to bloodroot ({Sanguinaria Canadensis}), and
   to an extensive order of plants ({H[ae]modorace[ae]}), the
   roots of many species of which contain a red coloring matter
   useful in dyeing.

Source : WordNet®

bloodwort
     n : any of various plants of the family Haemodoraceae; roots
         contain a deep red coloring matter