senna

Any of various plants in the pea family, chiefly of the genera Senna and Chamaecrista, having pinnately compound leaves and showy, nearly regular, usually yellow flowers, used as ornamentals and for medicinal purposes.

A preparation of the dried leaves of Senna alexandrina, used as a laxative.

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.

The dried leaves or pods of these plants (especially of Cassia angustifolia or Cassia acutifolia) used medicinally.