Hypertext Webster Gateway: "senna"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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. ({C. acutifolia}, {C. angustifolia}, etc.).
They constitute a valuable but nauseous cathartic
medicine.
2. (Bot.) The plants themselves, native to the East, but now
cultivated largely in the south of Europe and in the West
Indies.
{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.
From WordNet (r) 1.7 (wn)
senna
n : any of various plants of the genus Senna having pinnately
compound leaves and showy usually yellow flowers; many
are used medicinally
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