硬化橡皮,硬橡皮
Ebonite \Eb"on*ite\, n. (Chem.) 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.
ebonite n : a hard nonresilient rubber formed by vulcanizing natural rubber [syn: {hard rubber}, {vulcanite}]