Noun: iodine-131
- Heavy radioactive isotope of iodine with a half-life of 8 days; used in a sodium salt to diagnose thyroid disease and to treat goitre
"Iodine-131 is used in radiation therapy for thyroid cancer"
Type of: atomic number 53, I, iodine, radioisotope, radionuclide
Encyclopedia: Iodine-131