Source : Webster's Revised Unabridged Dictionary (1913)

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.

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

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

Source : WordNet®

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