a virus transmitted from infected birds by the common culex mosquito and causing a form of encephalitis () that is characterized by fever, headache, drowsiness, nausea, and a rash
Origin:
after West Nile District of Uganda, where it was discovered
See West Nile virus in American Heritage Dictionary 4
noun
A viral disease of varying severity occurring in Africa, Asia, the Mediterranean, and parts of North America that is transmitted by a culex mosquito.