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 mosquito-borne disease caused by any one of four different blood parasites, called Plasmodia. The disease is transmitted to people by the Anopheles mosquito. This disease is a leading cause of debilitating illness, with over 300-500 million cases and 1 million deaths each year from around the world.