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.