A hypothetically indestructible, uncreatable, highly elastic, self - repellent, all - pervading fluid formerly thought responsible for the production, possession, and transfer of heat.

• 热质曾被认为是使热量产生、贮存和传输的一种假想的不可破坏的、不可创造的、有高度弹性的、自斥的且到处都有的流体