Radioiodination is a common technique used in molecular biology and medical science, where an iodine isotope is added to a molecule or compound to make it detectable by radiation. However, there are several synonyms for this process, including radiolabelling, radiotracing, and radiolabelling. These terms are often used interchangeably to describe the same process, but each has its own nuances and applications. Radiolabelling, for example, is a broad term that refers to the process of adding a radioactive element to a compound, while radiotracing describes the use of radioactive isotopes to track the flow of a substance. Regardless of the terminology used, radioiodination remains a crucial tool in the fields of biology and medicine.