1) Antibody 2) Isoantibody 1) Isoantibody 
An antibody specific for an alloantigen. Isoantibody is sometimes used in this sense. ... (05 Mar 2000) ... 
(al″o-an´tĭ-bod″e) isoantibody.
(= alloserum) Antibody raised in one member of a species that recognizes genetic determinants in other individuals of the same species. Common in multiparous women and multiply-transfused individuals who tend to have alloantibodies to MHC or blood group antigens.
Type: Term Pronunciation: al′ō-an′ti-bod-ē Definitions: 1. An antibody specific for an alloantigen.
alloantibody 1. An antibody produced by one individual that reacts with alloantigens of another individual of the same species. 2. An antibody that occurs naturally against foreign ('other') tissues from a person of the same species.
an antibody that reacts with an antigen from a genetically different individual of the same species.