Definitions for eboniteˈɛb əˌnaɪt
Random House Webster's College Dictionary
Ref: vulcanite .
Origin of ebonite:
hard rubber, vulcanite, ebonite(noun)
a hard nonresilient rubber formed by vulcanizing natural rubber
The relatively hard product of vulcanizing natural rubber with sulfur; vulcanite
a hard, black variety of vulcanite. It may be cut and polished, and is used for many small articles, as combs and buttons, and for insulating material in electric apparatus
The Standard Electrical Dictionary
Hard vulcanized India rubber, black in color. Specific resistance in ohms per cubic centimeter at 46º C. (115º F.): 34E15 (Ayrton); specific inductive capacity, (air = 1): 2.56 (Wüllner); 2.76 (Schiller); 3.15 (Boltzmann). It is used in electrical apparatus for supporting members such as pillars, and is an excellent material for frictional generation of potential. Its black color gives it its name, and is sometimes made a point of distinction from Vulcanite, q. v.