a poisonous herb native to northern Europe having hooded blue-purple flowers; the dried leaves and roots yield aconiteSynonyms: helmetflowerhelmet flowerAconitum napellus
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Webster's Dictionary (GCIDE)
Monkshood \Monks"hood`\, n. (Bot.) A plant of the genus Aconitum; aconite. See Aconite. [1913 Webster]