Source : Webster's Revised Unabridged Dictionary (1913)

Gummy \Gum"my\, a. [Compar. {Gummer} (?); superl. {Gummirst}.]
   Consisting of gum; viscous; adhesive; producing or containing
   gum; covered with gum or a substance resembling gum.

         Kindles the gummy bark of fir or pine.   --Milton.

         Then rubs his gummy eyes.                --Dryden.

   {Gummy tumor} (Med.), a gumma.

Source : WordNet®

gummy
     adj : having the properties of glue [syn: {gluey}, {glutinous}, {mucilaginous},
            {pasty}, {sticky}, {viscid}, {viscous}]
     [also: {gummiest}, {gummier}]