1. <medicine> The leaves of several leguminous plants of the genus Cassia. (C. Acutifolia. C. Angustifolia, etc). They constitute a valuable but nauseous cathartic medicine.

2. <botany> The plants themselves, native to the East, but now cultivated largely in the south of Europe and in the West Indies. Bladder senna.

<botany> The Cassia Marilandica, growing in the United States, the leaves of which are used medicinally, like those of the officinal senna.

Origin: Cf. It. & Sp. Sena, Pg. Sene, F. Sene; all fr. Ar. Sana.

(01 Mar 1998)