Source : Webster's Revised Unabridged Dictionary (1913)

Bloodroot \Blood"root`\, n. (Bot.)
   A plant ({Sanguinaria Canadensis}), with a red root and red
   sap, and bearing a pretty, white flower in early spring; --
   called also {puccoon}, {redroot}, {bloodwort}, {tetterwort},
   {turmeric}, and {Indian paint}. It has acrid emetic
   properties, and the rootstock is used as a stimulant
   expectorant. See {Sanguinaria}.

   Note: In England the name is given to the tormentil, once
         used as a remedy for dysentery.

Source : WordNet®

bloodroot
     n : perennial woodland native of North America having a red root
         and red sap and bearing a solitary lobed leave and white
         flower in early spring and having acrid emetic
         properties; rootstock used as a stimulant and expectorant
         [syn: {puccoon}, {redroot}, {tetterwort}, {Sanguinaria
         canadensis}]