noun Date: 1886 cellular rubber resembling a natural sponge in structure used especially for cushions, vibration dampeners, weather stripping, and gaskets
SPONGE RUBBER
Meaning of SPONGE RUBBER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012