1) Agglutinin 
<immunology> An isoantibody that causes agglutination of cells of genetically different members of the same species. ... Synonym: isohemagglutinin. ... (05 Mar 2000) ... 
(i″so-ә-gloo´tĭ-nin) an isoantibody capable of agglutinating cells of other individuals of the same species.
Type: Term Pronunciation: ī′sō-ă-glū′ti-nin Definitions: 1. An isoantibody that causes agglutination of cells of genetically different members of the same species. Synonyms: isohemagglutinin
[n] - an antibody produced by one individual that causes agglutination of red blood cells in other individuals of the same species
isoagglutinin An isoantibody that causes agglutination of cells of genetically different members of the same species.
an agglutinin that can effect isoagglutination.