radioiodine: Meaning and Definition of

ra•di•o•i•o•dine

Pronunciation: (r?"d?-?-?'u-d?n", -din, -d?n"), [key]
? n. Chem.
  1. any of nine radioisotopes of iodine, esp. iodine 131 and iodine 125, used as radioactive tracers in research and clinical diagnosis and treatment.
Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease.