radioimmunoassay

noun

A procedure that uses the binding of a radioactively labeled substance to an antibody in order to analyze minute amounts of biological compounds.

OriginEnglish immunoassay ← Middle French immun ← Latin immūnis →
UncommonScrabble 24
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Meanings

nounradioimmunoassay (plural radioimmunoassays, abbreviation RIA)

plural radioimmunoassays · abbreviation RIA

  1. A procedure that uses the binding of a radioactively labeled substance to an antibody in order to analyze minute amounts of biological compounds.
verbradioimmunoassay (third-person singular simple present radioimmunoassays, present participle radioimmunoassaying, simple past and past participle radioimmunoassayed)

present singular third person radioimmunoassays · participle present radioimmunoassaying · participle past radioimmunoassayed · past radioimmunoassayed

  1. To assay by this process.

Synonyms & antonyms

Also see
immunoradioassay

Origin

  1. Latinradius
  2. Englishradio-
  3. Proto-Indo-European*mey-
  4. Proto-Indo-European*moy-nós
  5. Proto-Italic*moinos
  6. Latinmūnus
  7. Proto-Indo-European*né
  8. Proto-Indo-European*n̥-
  9. Proto-Italic*n̥-
  10. Latinin-
  11. Latinin- -is
  12. Latinimmūnis
  13. Middle Frenchimmun
  14. Englishimmune
  15. Englishimmuno-
  16. Englishassay
  17. Englishimmunoassay
  18. Englishradioimmunoassay

From radio- + immunoassay.

Full word history & related roots →

Rhymes & wordplay

Anagrams

immunoradioassay
Cite this entry
APA

radioimmunoassay. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/radioimmunoassay

MLA

“radioimmunoassay.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/radioimmunoassay. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “radioimmunoassay,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/radioimmunoassay.

Source: radioimmunoassay on Wiktionary, CC BY-SA 4.0.