Wordnet 3.0
NOUN (1)
1.
a plant of the genus Valeriana having lobed or dissected leaves and cymose white or pink flowers;
The Collaborative International Dictionary of English v.0.48:
Valerian \Va*le"ri*an\, 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.
val['e]riane.] (Bot.)
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]
Greek valerian (Bot.), a plant (Polemonium caeruleum)
with blue or white flowers, and leaves resembling those of
the officinal valerian.
[1913 Webster]
WordNet (r) 3.0 (2006):
valerian
n 1: a plant of the genus Valeriana having lobed or dissected
leaves and cymose white or pink flowers