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Pronunciation: se-ne'se-o, -she-o


  1. A large genus of plants (family Compositae), many species of which contain alkaloids that produce hepatic necrosis.
  2. A common weed of the eastern U.S., formerly used in the treatment of amenorrhea and other menstrual irregularities.

[L. a plant, groundsel, fr. senecio, an old man]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.