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.
1 Malaria is a life-threatening disease caused by parasites that are transmitted to people through the bites of infected female mosquitoes. 2  About 3.2 billion people â almost half of the worldâs population â are at risk of malaria.