adjective
designating a family (Apocynaceae, order Gentianales) of dicotyledonous herbs, shrubs, and trees, including frangipani and periwinkle
Origin:
so named because said to be poisonous to dogs
noun
any of a genus (Apocynum) of sometimes poisonous plants of the dogbane family, with opposite, entire leaves, small white or pink flowers, and milky juice