Immunochemical is a scientific term that refers to techniques, tests, or substances related to immunology that utilizes the principles of chemistry. However, there are many synonyms or related words that can be used in lieu of "immunochemical." These include immunological, serological, immunodiagnostic, immunoassay, immunoblotting, and immunostaining. Immunological refers to the study of the immune system and its functions. Serological refers to the study of blood serum and its components. Immunodiagnostic and immunoassay are tests that measure the presence or quantity of an antigen or antibody. Immunoblotting is a technique that uses antibodies to detect specific proteins in a sample, while immunostaining is a technique that uses antibodies to detect specific molecules in cells or tissues.