Source : Webster's Revised Unabridged Dictionary (1913)

Tetterwort \Tet"ter*wort`\, n. (Bot.)
   A plant used as a remedy for tetter, -- in England the
   calendine, in America the bloodroot.

Source : WordNet®

tetterwort
     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}, {Sanguinaria
         canadensis}]