Medical Definition of excoriation. 1: the act of abrading or wearing off the skin chafing and excoriation of the skin.
malaria. noun. 1  An infectious disease characterized by cycles of chills, fever, and sweating, caused by a protozoan of the genus Plasmodium in red blood cells, which is transmitted to humans by the bite of an infected female anopheles mosquito.
Malaria is a tropical disease. It is spread by mosquitoes infected with malaria parasites. In this video, an expert explains how malaria attacks different areas of the body, and what you can do to avoid getting infected. Media last reviewed: 31/01/2014.