valerian, n. [LL. valeriana, perhaps from some person named Valerius, or fr. L. valere to be strong. powerful, on account of its medicinal virtues: cf. F. valériane.].
Greek valerian (Bot.), a plant (Polemonium cæruleum) with blue or white flowers, and leaves resembling those of the officinal valerian.
Any plant of the genus Valeriana. The root of the officinal valerian (Valeriana officinalis) has a strong smell, and is much used in medicine as an antispasmodic. [1913 Webster]