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WordReference Random House Unabridged Dictionary of American English © 2024sen•na (sen′ə),USA pronunciation n. - Plant Biologyany plant, shrub, or tree belonging to the genus Cassia, of the legume family, having pinnate leaves and large clusters of flowers.
- Drugsany of various cathartic drugs consisting of the dried leaflets of certain of these plants, as one drug (Alexandrian senna)derived from C. acutifolia, or another (Tinnevelly senna) derived from C. angustifolia.
- Plant BiologySee wild senna.
- Arabic sanā
- Neo-Latin
- 1535–45
Collins Concise English Dictionary © HarperCollins Publishers:: senna /ˈsɛnə/ n - any of various tropical plants of the leguminous genus Cassia, esp C. angustifolia (Arabian senna) and C. acutifolia (Alexandrian senna), having typically yellow flowers and long pods
- senna leaf ⇒ the dried leaflets of any of these plants, used as a cathartic and laxative
- senna pods ⇒ the dried fruits of any of these plants, used as a cathartic and laxative
Etymology: 16th Century: via New Latin from Arabic sanā Collins Concise English Dictionary © HarperCollins Publishers:: Senna /ˈsɛnə/ n - Ayrton (ˈɛətən). 1960–94, Brazilian racing driver: world champion (1988, 1990, 1991)
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