radioimmunoassay
noun
ra·dio·im·mu·no·as·say
ˌrā-dē-ˌō-i-myə-nō-ˈa-ˌsā 
-i-ˌmyü-,
-a-ˈsā
: immunoassay of a substance that has been radioactively labeled
Examples of radioimmunoassay in a Sentence
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Yalow shared the 1977 medicine prize for the development of radioimmunoassays of peptide hormones.
—
Scott Lafee, San Diego Union-Tribune, 28 Oct. 2025
The remaining half was awarded to Yalow for the development of radioimmunoassays, which detect substances in the body that exist in very small quantities.
—Eryn Brown, Washington Post, 23 Feb. 2024
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Scott Lafee, San Diego Union-Tribune, 28 Oct. 2025
The remaining half was awarded to Yalow for the development of radioimmunoassays, which detect substances in the body that exist in very small quantities.
—Eryn Brown, Washington Post, 23 Feb. 2024
Cite this Entry
“Radioimmunoassay.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radioimmunoassay. Accessed 6 Nov. 2025.
Copy CitationMedical Definition
radioimmunoassay
noun
ra·dio·im·mu·no·as·say
ˌrād-ē-ō-ˌim-yə-nō-ˈas-ˌā, -im-ˌyü-, -a-ˈsā
: immunoassay of a substance (as insulin) that has been radiolabeled
—abbreviation RIA
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