Meaning of GUM in English
( n. )
A vegetable secretion of many trees or plants that hardens when it exudes, but is soluble in water; as, gum arabic; gum tragacanth; the gum of the cherry tree. Also, with less propriety, exudations that are not soluble in water; as, gum copal and gum sandarac, which are really resins.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012