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senna

sen·na [ sénnə ]


noun 
Definition:
 
1. flowering plant used as laxative: a leguminous plant. Flowers: yellow, in clusters. Native to: temperate regions.  Genus Cassia.

2. dried leaves or pods: dried plant leaves or pods of the senna plant. Use: purgative, laxative.

[Mid-16th century. Via modern Latin senna< Arabic sanā']
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