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Definition of: valerian
(və·lir′ē·ən) noun
1. Any of a genus (Valeriana) of perennial herbs having flowers in cymes and roots often strong-smelling, especially the garden heliotrope.
2. The dried root of the garden heliotrope, which has been used as a sedative and carminative. [<OF valeriane <Med. L valeriana, appar. ult. <Valerius a personal name]
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