What is another word for antigenic determinant?
Pronunciation: [ˌantɪd͡ʒˈɛnɪk dɪtˈɜːmɪnənt] (IPA) 
Antigenic determinant is a term used to describe a specific region on the surface of an antigen molecule that is recognized by the immune system and triggers an immune response. There are several synonyms for antigenic determinant, including epitope, antigenic site, antigenic determinant site, antigenic determinants, antigenic region and antigenic segment. These terms are commonly used interchangeably in the field of immunology. Epitope is perhaps the most commonly used synonym, and is defined as the portion of an antigen molecule that is specifically recognized by an antibody or T cell receptor. Regardless of the term used, antigenic determinants play a crucial role in the recognition and elimination of pathogens by the immune system.
