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 serious and sometimes life-threatening tropical disease that spreads through parasites. It kills more than 400,000 people a year, many of them children in Africa. Although malaria is almost wiped out in the United States, you can still get the disease when you travel to other parts of the world.