绝缘体juéyuántǐ极不容易传导热或电的物体,分为热的绝缘体(如土、气体、橡胶)和电的绝缘体(如陶瓷、云母、油脂、橡胶)。{insulator; material that inhibits conduction of heat or electricity, divided into two categories: heat insulators, such as earth, gas and rubber, and electricity insulators, such as pottery, porcelain, mica, grease and rubber;}也叫also非导体{fēidǎotǐ}。