Aconite

n.
  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.
  3. Winter aconite ,
    a plant (Eranthis hyemalis) allied to the aconites.