thermoplastic has definitions from the field of chemistry
1
[ adjective ] having the property of softening or fusing when heated and of hardening and becoming rigid again when cooled

Examples

"thermoplastic materials can be remelted and cooled time after time without undergoing any appreciable chemical change"

Related terms

thermosetting

2
[ noun ] (chemistry) a material that softens when heated and hardens again when cooled

Related terms

plastic celluloid saran

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