aconite

from WordNet (r) 3.0 (2006)

aconite
    n 1: any of various usually poisonous plants of the genus
         Aconitum having tuberous roots and palmately lobed leaves
         and blue or white flowers

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]