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English definition of “valerian”

valerian

noun [U] uk   /vəˈlɪə.ri.ən/ specialized us  
a plant with small white or pink flowers and a root that is used in medicines, especially as a sedative (= drug to calm you or make you sleep)Flowers and flowering plantsFlowers - general wordsSpecific medicines and drugsSpecific types of drug
(Definition of valerian from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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