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 sen·e·ca snakeroot /ˈsɛnɪkə-/ 名詞

 Sen·e·cas n. pl.; sing. Seneca . Ethnol. A tribe of Indians who formerly inhabited a part of Western New York. This tribe was the most numerous and most warlike of the Five Nations.
 Seneca grassBot., holy grass. See under Holy.
 Seneca eil, petroleum or naphtha.
 Seneca root, or Seneca snakeroot Bot., the rootstock of an American species of milkworth (Polygala Senega) having an aromatic but bitter taste. It is often used medicinally as an expectorant and diuretic, and, in large doses, as an emetic and cathartic. [Written also Senega root, and Seneka root.]
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 Seneca snakeroot
      n : eastern North American plant having a terminal cluster of
          small white flowers and medicinal roots [syn: Seneka
          snakeroot, senga root, senega root, senega
          snakeroot, Polygala senega]