<disease> This congenital disease, which is caused a deficiency of a blood factor that promotes platelet adhesion, is characterised by prolonged bleeding and poor blood coagulation. ... (09 Oct 1997) ... 
Autosomal dominant platelet disorder in which adhesion to collagen, but not aggregation, is reduced. Both bleeding time and coagulation are increased. Factor VIII levels are secondarily reduced.
[n] - a form of hemophilia discovered by Erik von Willebrand
a genetic disorder characterised by excessive bleeding 
angiohemophilia noun a form of hemophilia discovered by Erik von Willebrand; a genetic disorder that is inherited as an autosomal recessive trait; characterized by a deficiency of the coagulation factor and by mucosal bleeding