Definitions

from The Century Dictionary.

  • noun A drug consisting of the dried leaflets of several species of Cassia.
  • noun Any species of Cassia yielding the above drug. The name is extended more or less to other species of Cassia, and to a few similar plants.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Med.) The leaves of several leguminous plants of the genus Cassia. (C. acutifolia, C. angustifolia, etc.). They constitute a valuable but nauseous cathartic medicine.
  • noun (Bot.) The plants themselves, native to the East, but now cultivated largely in the south of Europe and in the West Indies.
  • noun (Bot.) See under Bladder.
  • noun (Bot.) the Cassia Marilandica, growing in the United States, the leaves of which are used medicinally, like those of the officinal senna.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • proper noun A taxonomic genus within the subtribe Cassiinae — the senna tree.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun any of various plants of the genus Senna having pinnately compound leaves and showy usually yellow flowers; many are used medicinally

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Arabic سنا (sanā).

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