Ebonite

n.

1.

(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.

Noun

1.

ebonite - a hard nonresilient rubber formed by vulcanizing natural rubber Synonyms: hard rubber, vulcanite

caoutchouc, gum elastic, hard rubber, India rubber, rubber, vulcanite