Aconitum napellus

from WordNet (r) 3.0 (2006)

Aconitum napellus
    n 1: a poisonous herb native to northern Europe having hooded
         blue-purple flowers; the dried leaves and roots yield
         aconite [syn: {monkshood}, {helmetflower}, {helmet flower},
         {Aconitum napellus}]

from The Collaborative International Dictionary of English v.0.48

Aconite \Ac"o*nite\, n. [L. aconitum, Gr. ?: cf. F. aconit.]
   1. (Bot.) The herb wolfsbane, or monkshood; -- applied to any
      plant of the genus {Aconitum} (tribe {Hellebore}), all the
      species of which are poisonous.
      [1913 Webster]

   2. An extract or tincture obtained from {Aconitum napellus},
      used as a poison and medicinally.
      [1913 Webster]

   {Winter aconite}, a plant ({Eranthis hyemalis}) allied to the
      aconites.
      [1913 Webster]