radioactive iodine uptake test radioactive iodine test • radioactively · · · Info · Definitions · Synonyms · Characters · · radioactive iodine uptake test · · Text Common · · Latin · · Scripts 30 · · Length 9 · · Syllables Definitions · · · (noun) radioactive iodine test that measures the amount of radioactive iodine taken up by the thyroid gland. Synonyms: radioactive iodine uptake test, RAIU. · · Noun Definition 1 Synonyms · · · raiu · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 k latin small letter k U+006B n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 v latin small letter v U+0076