v.
Function: noun
Etymology: (Great) Rift Valley, Africa
Date: circa 1931
: an acute usually epizootic mosquito-borne disease of domestic animals chiefly of eastern and southern Africa that is caused by a single-stranded RNA virus (species Rift valley fever virus of the genus Phlebovirus, family Bunyaviridae ), is marked especially by fever, abortion, and death of newborns, and is sometimes transmitted to humans usually in a less severe form