- soft and pliable when heated, as some plastics, without any change of the inherent properties.
- a plastic of this type.
Origin of thermoplastic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- (of a material, esp a synthetic plastic or resin) becoming soft when heated and rehardening on cooling without appreciable change of propertiesCompare thermosetting
- a synthetic plastic or resin, such as polystyrene, with these properties
Word Origin and History for thermoplastic
Online Etymology Dictionary, © 2010 Douglas Harper
- Of or relating to a compound that can be repeatedly made soft and hard through heating and cooling. Polyethylene and polystyrene are thermoplastic resins. Compare thermosetting.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.