thermoplastic
adj 1: having the property of softening or fusing when heated
and of hardening and becoming rigid again when cooled;
"thermoplastic materials can be remelted and cooled time
after time without undergoing any appreciable chemical
change" [ant: {thermoset}, {thermosetting}]
n 1: a material that softens when heated and hardens again when
cooled [syn: {thermoplastic}, {thermoplastic resin}]