1. a hard black rubber made by vulcanizing natural rubber with sulfur
Usage: technical

Examples

• The vintage fountain pen had an ebonite barrel that had aged to a deep black.
• Ebonite was commonly used for electrical insulators in the early 20th century.
• The craftsman polished the ebonite surface until it gleamed.
• Old telephone components were often made from ebonite due to its insulating properties.
• The antique pipe stem was carved from high-quality ebonite.
• Ebonite requires careful handling as it can become brittle with age.