any plant of the genus Valeriana, as the common valerian V. officinalis, having small, fragrant flowers of white, lavender, or pink and a root that is used medicinally.
2.
a drug consisting of or made from the root, formerly used as a nerve sedative and antispasmodic.
Origin: 1350–1400;Middle Englishvalirian < Medieval Latinvaleriāna (herb) of Valeria (old Roman province, where plant is said to have been common); see -an
Also called: allheal any of various Eurasian valerianaceous plants of the genus Valeriana, esp V. officinalis, having small white or pinkish flowers and a medicinal root
2.
a sedative drug made from the dried roots of V. officinalis
[C14: via Old French from Medieval Latin valeriana (herba) (herb) of Valerius, unexplained Latin personal name]
Valerian (vəˈlɛərɪən)
—n
Latin name Publius Licinius Valerianus. died 260 ad, Roman emperor (253--260): renewed persecution of the Christians; defeated by the Persians
late 14c., from O.Fr. valeriane, apparently from fem. sing. of L. adj. Valerianus, from the personal name Valerius (see Valerie); but Weekley writes, "some of the Ger. and Scand. forms of the name point rather to connection with the saga-hero Wieland."