idiotypic
/ˌɪdɪə(ʊ)ˈtɪpɪk/adjective
1 Genetics. Of or relating to an individual's idiotype; genetic, inherited. Now rare.
2 Immunology. Of or relating to the idiotype of an immunoglobulin molecule; (of a vaccine) directed against an idiotype.
Origin
Mid 19th century (in an earlier sense). From idiotype + -ic.