1. 
[syn: monkshood, helmetflower, helmet flower, Aconitum napellus]
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]
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]