Source : Webster's Revised Unabridged Dictionary (1913)

Sanguinaria \San`gui*na"ri*a\, n. [NL. See {Sanguinary}, a. &
   n.]
   1. (Bot.) A genus of plants of the Poppy family.

   Note: {Sanguinaria Canadensis}, or bloodroot, is the only
         species. It has a perennial rootstock, which sends up a
         few roundish lobed leaves and solitary white blossoms
         in early spring. See {Bloodroot}.

   2. The rootstock of the bloodroot, used in medicine as an
      emetic, etc.

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.

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®

Sanguinaria canadensis
     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: {bloodroot}, {puccoon}, {redroot}, {tetterwort}]