n. [ Cf. It. & Sp. sena, Pg. sene, F. séné; all fr. Ar. sanā. ] 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 ]

n. See Seannachie. [ 1913 Webster ]

n. [ Properly, a sign given for the entrance or exit of actors, from OF. sinet, signet, dim. of signe. See Signet. ] A signal call on a trumpet or cornet for entrance or exit on the stage. [ Obs. ] [ 1913 Webster ]

n. (Zool.) The barracuda. [ 1913 Webster ]

n. [ Contr. fr. sevennight. ] The space of seven nights and days; a week. [ Written also se'nnight. ] [ Archaic. ] Shak. Tennyson. [ 1913 Webster ]

n. [ Seven + knit. ] 1. (Naut.) A braided cord or fabric formed by plaiting together rope yarns or other small stuff. [ 1913 Webster ]

2. Plaited straw or palm leaves for making hats. [ 1913 Webster ]