from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Becoming soft when heated and hard when cooled.
  • n. A thermoplastic resin, such as polystyrene or polyethylene.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. softening when heated and hardening when cooled
  • n. A plastic with this property.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a material that softens when heated and hardens again when cooled
  • adj. having the property of softening or fusing when heated and of hardening and becoming rigid again when cooled


thermo- +‎ plastic (Wiktionary)



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