any molecule capable of inducing the immune system to produce an antibody response against it
any substance or organism that provokes an immune response (produces immunity) when introduced into the body
{i} antigen, substance which triggers an immune response, material which stimulates the production of antibodies
Substance which is capable of eliciting immune response An immunogen usually has a fairly high molecular weight (usually greater than 10,000), thus, a variety of macromolecules such as proteins, lipoprotein, polysaccharides, and some nucleic acids can act as immunogens
A substance, also called an antigen, capable of provoking an immune response See also Antigen