ˈärthəs-, F ȧrtu̅e̅u̅e̅s- noun
Usage: usually capitalized A
Etymology: probably translation of French phénomène d'Arthus, after Nicholas M. Arthus died 1945 French bacteriologist
: a reaction following injection of an antigen into an animal in which hypersensitivity has been previously established involving infiltrations, edema, sterile abscesses, and in severe cases gangrene