A concrete juice produced by various trees found in
   the Malayan archipelago, especially by the Isonandra, / Dichopsis,
   Gutta. It becomes soft, and unpressible at the tamperature of boiling
   water, and, on cooling, retains its new shape. It dissolves in oils and
   ethers, but not in water. In many of its properties it resembles
   caoutchouc, and it is extensively used for many economical purposes.
   The Mimusops globosa of Guiana also yields this material.