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
Dermatomyositis (DM): This type of myositis causes the muscle weakness of Polymyositis plus a skin rash. It is often characterized with areas of slightly raised reddish, scaly rash. The rash can be on the bridge of the nose, around the eyes, or on sun-exposed areas of the neck and chest.hese almost always cause weakness and may also cause muscle swelling and pain. Myositis can be caused by a number of things such as injury, infection or in combination with an autoimmune disease such as lupus.