'Senna' definitions:
Definition of 'senna'
From: WordNet
noun
Any of various plants of the genus Senna having pinnately compound leaves and showy usually yellow flowers; many are used medicinally
Definition of 'Senna'
From: GCIDE
- Senna \Sen"na\, n. [Cf. It. & Sp. sena, Pg. sene, F. s['e]n['e]; all fr. Ar. san[=a].]
- 1. (Med.) The leaves of several leguminous plants of the genus Cassia. (Cassia acutifolia, {Cassia angustifolia}, etc.). They constitute a valuable but nauseous cathartic medicine. [1913 Webster]
- 2. (Bot.) The plants themselves, native to the East, but now cultivated largely in the south of Europe and in the West Indies. [1913 Webster]
- Bladder senna. (Bot.) See under Bladder.
- Wild senna (Bot.), the Cassia Marilandica, growing in the United States, the leaves of which are used medicinally, like those of the officinal senna. [1913 Webster]