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 caused by a parasite called Plasmodium, which is transmitted via the bites of infected mosquitoes.There are four main types of malaria which infect humans: Plasmodium falciparum, P. vivax, P. malariae and P. ovale.alaria is caused by a parasite called Plasmodium, which is transmitted via the bites of infected mosquitoes.