antigenicity an·ti·ge·nic·i·ty (ān'tĭ-jə-nĭs'ĭ-tē)
The capacity to induce an immune response.
The degree to which a substance induces an immune response. Also called immunogenicity.
antigen an·ti·gen (ān'tĭ-jən)
Any of various substances, including toxins, bacteria, and the cells of transplanted organs, that when introduced into the body stimulate the production of antibodies. Also called allergen, immunogen.