Col·ic·root n. A bitter American herb of the Bloodwort family, with the leaves all radical, and the small yellow or white flowers in a long spike (Aletris farinosa and Aletris aurea).  Called sometimes star grass, blackroot, blazing star, and unicorn root.
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 Aletris aurea
      n : colicroot with yellow-bracted racemose flowers; smaller than
          Aletris farinosa; southeastern United States [syn: yellow
          colicroot]