'Dogbane' definitions:

Definition of 'dogbane'

(from WordNet)
noun
Any of several poisonous perennial plants of the genus Apocynum having acrid milky juice and bell-shaped white or pink flowers and a very bitter root

Definition of 'Dogbane'

From: GCIDE
  • Dogbane \Dog"bane`\, n. [Said to be poisonous to dogs. Cf. Apocynaceous.] (Bot.) A small genus of perennial herbaceous plants, with poisonous milky juice, bearing slender pods pods in pairs. [1913 Webster]