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.
The definition of a mosquito is a member of the family Culicidae that sucks blood from animals. An example of a mosquito is a pesky flying summer bug that can cause West Nile virus, malaria and yellow fever. mosquito. pl. mosquito.