Antibody that is heterologous with respect to antigen, in contradistinction to isoantibody. ... (05 Mar 2000) ... 
(het″әr-o-an″tĭ-bod´e) an antibody combining with antigens originating from a species foreign to the antibody producer.
Type: Term Pronunciation: het′ĕr-ō-an′ti-bod-ē Definitions: 1. Antibody that is heterologous with respect to antigen, in contradistinction to isoantibody.