Dictionary.net

• reaction of the body to a transfusion of blood that is not compatible with its own blood; an adverse reaction can range from fever and hives to renal failure and shock and death

2006 - WordNet 3.0
By Princeton University

• reaction of the body to a transfusion of blood that is not compatible with its own blood; an adverse reaction can range from fever and hives to renal failure and shock and death

2011 - English Dictionary Database
By DataStellar Co., Ltd