Conductor Definition. In science, a conductor is a material which permits a flow of energy. A material which allows the flow of charged particles is an electrical conductor. A material which allows the transfer of thermal energy is a thermal conductor or heat conductor. Although electrical and thermal conductivity is most common, other types of energy may be transferred.
Define polymyositis: inflammation of several muscles at once; specifically : an inflammatory muscle disease of unknownâ¦ â polymyositis in a sentence inflammation of several muscles at once; specifically : an inflammatory muscle disease of unknown cause that affects muscles and chiefly skeletalâ¦ See the full definition
By Sarah Maurer. Myositis literally means inflammation (swelling, soreness) of the muscles. General muscle soreness is common and has many causes, including infection, injury, overuse and medication side effects. However, the term myositis most commonly refers to a group of diseases also known as idiopathic inflammatory myopathies (IIMs).