senna

Etymology

From Arabic سَنَا (sanā, “senna”).

noun

  1. (countable) Any of several plants of the tribe Cassieae, especially those of the genera Cassia and Senna, whose leaves and pods are used as a purgative and laxative.
  2. (uncountable) The dried leaves or pods of these plants (especially of Senna alexandrina, syn. Cassia angustifolia or Cassia acutifolia), used medicinally.
  3. (medicine) senna glycoside, a laxative.

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