Crossreactive refers to the ability of an antibody or molecule to bind to multiple unrelated antigens. Synonyms for this term may include "polyreactive," "promiscuous," "non-specific," "cross-binding," or "cross-reactive." For example, a crossreactive antibody may bind to and recognize both a pathogen and a host cell protein in the body, leading to autoimmune disorders. Alternatively, crossreactive molecules may be used in diagnostic tests to detect various antigens simultaneously, improving the accuracy and efficiency of the testing process. Understanding the concept of crossreactivity and its various synonyms is crucial in the fields of immunology, diagnostic testing, and drug development.