No new information in Greencastle woman's disappearance. No new information in Greencastle woman's disappearanceThere was still no word Tuesday night on the whereabouts of Julie McCutcheon, the Greencastle woman who went missing a week ago while house-sitting for a friend in Gettysburg.
Medical Definition of ANTIGEN. : any substance (as an immunogen or a hapten) foreign to the body that evokes an immune response either alone or after forming a complex with a larger molecule (as a protein) and that is capable of binding with a product (as an antibody or T cell) of the immune response.â anÂ·tiÂ·genÂ·ic \Ëan-ti-Ëje-nik\ adjective.edical Definition of ANTIGEN. : any substance (as an immunogen or a hapten) foreign to the body that evokes an immune response either alone or after forming a complex with a larger molecule (as a protein) and that is capable of binding with a product (as an antibody or T cell) of the immune response.
ANTIGEN - A molecule which can be specifically bound by an antibody (typically a. protein or carbohydrate recognized as foreign). EPITOPE (= â antigenic determinantâ =  antigenic specificity) - The minimum. target structure on an antigen which is bound by a particular antibody molecule. A. particular antigen molecule may (and generally does) bear many different epitopes or. âdeterminantsâ, each of which can be a target for antibody binding.