\Pink"root`\, n.
1. (Med.) The root of {Spigelia Marilandica}, used as a
   powerful vermifuge; also, that of {S. Anthelmia}. See
   definition 2 (below).
2. (Bot.)
   (a) A perennial North American herb ({Spigelia
       Marilandica}), sometimes cultivated for its showy red
       blossoms. Called also {Carolina pink}, {Maryland
       pinkroot}, and {worm grass}.
   (b) An annual South American and West Indian plant
       ({Spigelia Anthelmia}).