foam rubber

Noun
  1. Spongy rubber;
    Made by introducing air bubbles before vulcanization and used for cushioning or upholstery (synset 114897026)
    is a type of:
    • foam - a lightweight material in cellular form; made by introducing gas bubbles during manufacture
    • caoutchouc, gum elastic, india rubber, natural rubber, rubber - an elastic material obtained from the latex sap of trees (especially trees of the genera Hevea and Ficus) that can be vulcanized and finished into a variety of products

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