Part of speech: noun

A leguminous plant, used medicinally as a purgative.

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Usage examples "senna":

  1. 57. All medicine is nasty; Senna is a medicine. - "Symbolic Logic", Lewis Carroll.
  2. Whoever has seen certain Long Island roadsides bordered with wild senna, the brilliant flower clusters contrasted with the deep green of the beautiful foliage, knows that no effect produced by art along the drives of public park or private garden can match these country lanes in simple charm. - "Wild Flowers Worth Knowing", Neltje Blanchan et al.
  3. Senna plant, abundance of the, in Arabia, ii. - "Personal Narrative of a Pilgrimage to Al-Madinah & Meccah", Sir Richard Francis Burton.