noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The radioactive isotope of iodine, ¹³¹₅₃I, having a half-life of eight days; used as a medical tracer uncountable
2. 2
   heavy radioactive isotope of iodine with a half-life of 8 days; used in a sodium salt to diagnose thyroid disease and to treat goiter wordnet

Synonyms

All synonyms

radioiodine

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.