GUM Tragacanth. the gum of the tragacanth, a thorny bush growing in Crete, Asia, and Greece. This gum is of a much stronger body than either of the foregoing, and does not so perfectly dissolve in water. A dram of it will give the consistence of a syrup to a whole pint of water, which an ounce of gum arabic will scarce do. Hence it is used for forming troches and the like purposes, in preference to the other gums. In its general medicinal virtues, it agrees with gum arabic.
Other substances known by the name of gums, are as follow: