elastomer
| Any material with rubbery properties that stretches easily and then quickly returns to its original length when released. |
| Natural and synthetic rubbers and such materials as polychloroprene and butadiene copolymers are elastomers. The convoluted molecular chains making up these materials are uncoiled by a stretching force, but return to their original position when released because there are relatively few crosslinks between the chains. |
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