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: An infectious disease caused by protozoan parasites from the Plasmodium family that can be transmitted by the bite of the Anopheles mosquito or by a contaminated needle or transfusion.