Main Entry: id·io·type Pronunciation: 'id-E-&-"tIp Function: noun : the molecular structure and conformation in the variable region of animmunoglobulin that confers its antigenic specificity —compare ALLOTYPE, ISOTYPE —id·io·typ·ic/"id-E-&-'tip-ik/adjective
idiotype id·i·o·type (ĭd'ē-ə-tīp') n. A determinant that confers on an immunoglobulin molecule an antigenic individuality that is analogous to the individuality of the molecule's antibody activity.