Immunoconjugates are antibodies conjugated (joined) to a second molecule, usually a toxin, radioisotope or label.
These conjugates are used in immunotherapy and to develop monoclonal antibody therapy as a targeted form of chemotherapy when they are often known as antibody-drug conjugates.
When the conjugates include a radioisotope see radioimmunotherapy. When the conjugates include a toxin see immunotoxin.