[1] : The Collaborative International Dictionary of English v.0.48

pinkroot \pink"root`\, n.
   1. med. the root of spigelia marilandica, used as a
      powerful vermifuge; also, that of spigelia anthelmia.
      see definition 2 below.
      1913 webster

   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.
          1913 webster
see also:
spigelia marilandica spigelia anthelmia spigelia marilandica carolina pink maryland pinkroot worm grass 

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