1. (noun)rubber, natural rubber, India rubber, gum elastic, caoutchouc an elasticmaterial obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products
Definition of 'caoutchouc'
Webster Dictionary
1. (noun)caoutchouc a tenacious, elastic, gummy substance obtained from the milky sap of several plants of tropical SouthAmerica (esp. the euphorbiaceous tree Siphonia elastica or Hevea caoutchouc), Asia, and Africa. Being impermeable to liquids and gases, and not readly affected by exposure to air, acids, and alkalies, it is used, especially when vulcanized, for many purposes in the arts and in manufactures. Also called Indiarubber (because it was first brought from India, and was formerly used chiefly for erasing pencil marks) and gum elastic. See Vulcanization
Definition of 'caoutchouc'
The Standard Electrical Dictionary
1. caoutchouc India rubber; a substance existing in an emulsion or solution in the juice of certain trees and vines of the tropics, whence it is obtained by coagulation and drying. The name "rubber" is due to the fact that one of its earliest uses was for erasing pencilmarks by rubbing. It has a very highvalue as an insulator. The unworked cruderubber is called virgin gum; after workingover by kneading, it is termed masticated or pure gum rubber; after mixture with sulphur and heating, it is termed vulcanized rubber. If enoughsulphur is added it becomes hard, and if black, is termed ebonite; if vermilion or other pigment is also added to produce a reddish color, it is termed vulcanite. The masticated gum dissolves more or less completely in naphtha (sp. gr., .850) benzole, turpentine, chloroform, ether and other similar liquids.. The resistance per centimetercube of "Hooper's" vulcanized India rubber, such as is used in submarine cables is 1.5E16 ohms. The specific inductive capacity of pure Indiarubber is 2.34--of vulcanized 2.94 (Schiller).
Definitions of caoutchouc 
