1) Alloantibody 2) Antibody 1) Alloantibody 
<immunology> Antibody produced by one individual in response to antigen from another individual of the same species. The antibody reacts with antigens (isoantigens) of another individual of the same species. ... (20 Jun 2000) ... 
(i-so-an´tĭ-bod″e) an antibody produced by one individual that reacts with isoantigens of another individual of the same species; called also alloantibody.
Antibody made in response to antigen from another individual of the same species.
Type: Term Pronunciation: ī′sō-an′ti-bod-ē Definitions: 1. An antibody that occurs only in some individuals of a species and reacts specifically with a particular foreign isoantigen. For specific isoantibodies of blood groups, see Blood Groups Appendix. 2. Sometimes used as a synonym of alloantibody.
[n] - an antibody that occurs naturally against foreign tissues from a person of the same species
(formerly) an alloantibody.