thermoset
noun
ther·mo·set ˈthər-mō-ˌset 
: a thermosetting resin or plastic
Example Sentences
Recent Examples on the Web Hexion serves the global adhesive and industrial markets through a broad range of thermoset technologies, speciality products and technical support for customers in various applications and industries. 
Joe Cornell, Forbes, 11 Oct. 2021 Using an ultraviolet laser pointed at a surface of a liquid thermoset resin, SLA 3D printing first draws an object's support structures, and then the object. David Grossman, Popular Mechanics, 21 Oct. 2019
Joe Cornell, Forbes, 11 Oct. 2021 Using an ultraviolet laser pointed at a surface of a liquid thermoset resin, SLA 3D printing first draws an object's support structures, and then the object. David Grossman, Popular Mechanics, 21 Oct. 2019 Word History
First Known Use
1947, in the meaning defined above