Source : Webster's Revised Unabridged Dictionary (1913)

Imaginal \Im*ag"i*nal\, a. [L. imaginalis.]
   1. Characterized by imagination; imaginative; also, given to
      the use or rhetorical figures or imagins.

   2. (Zo["o]l.) Of or pertaining to an imago.

   {Imaginal disks} (Zo["o]l.), masses of hypodermic cells,
      carried by the larv[ae] of some insects after leaving the
      egg, from which masses the wings and legs of the adult are
      subsequently formed.