Source : Webster's Revised Unabridged Dictionary (1913)

Snapdragon \Snap"drag`on\, n.
   1. (Bot.)
      (a) Any plant of the scrrophulariaceous genus
          {Antirrhinum}, especially the cultivated {A. majus},
          whose showy flowers are fancifully likened to the face
          of a dragon.
      (b) A West Indian herb ({Ruellia tuberosa}) with curiously
          shaped blue flowers.

   2. A play in which raisins are snatched from a vessel
      containing burning brandy, and eaten; also, that which is
      so eaten. See {Flapdragon}. --Swift.

Source : WordNet®

snapdragon
     n : a garden plant of the genus Antirrhinum having showy white
         or yellow or crimson flowers resembling the face of a
         dragon