Rubber

A yellowish, amorphous, elastic material obtained from the milky sap or latex of various tropical plants, especially the rubber tree, and vulcanized, pigmented, finished, and modified into products such as electric insulation, elastic bands and belts, tires, and containers. Also called caoutchouc, India rubber. 2. Any of numerous synthetic elastic materials of varying chemical composition with properties similar to those of natural rubber. Shown is a auto tire made of synthetic rubber.