radioiodine

American

[rey-dee-oh-ahy-uh-dahyn, -din, -deen] / ˌreɪ di oʊˈaɪ əˌdaɪn, -dɪn, -ˌdin /

noun

Chemistry.

any of nine radioisotopes of iodine, especially iodine 131 and iodine 125, used as radioactive tracers in research and clinical diagnosis and treatment.

Etymology

Origin of radioiodine

First recorded in 1935–40; radio- + iodine

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The American Cancer Society says thyroid cancer can be detected early through a variety of medical exams, including annual physicals, medical history analyses, image and blood tests, ultrasound and radioiodine scans.

From Fox News

Radioiodine is a common treatment for thyroid conditions.

From BBC

No, it was the kind doctor who came bearing the radioiodine capsule in the glass tube.

From BBC

After treatment, 57 percent of the patients had at least one ultrasound, 24 percent had a radioiodine scan and 15 percent had a PET scan to monitor for signs of the return of their cancer.

From US News

Although the radioiodine kills the thyroid cancer cells, it increases the risk of a secondary cancer because it exposes the kidney, bladder and pelvic organs to radiation, Smallridge says.

From Washington Post

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023