Standard Lemma guide

radioimmunoassay

noun · verb · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

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Pronunciation

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1

noun

Meaning 1

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

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

verb

Meaning 2

To assay by this process.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

immunoassay of a substance that has been radioactively labeled

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: immunoassay, immunochemical assay

History

Etymology

Etymology tree Latin radiusder. English radio- Proto-Indo-European *mey- Proto-Indo-European *moy-nósder. Proto-Italic *moinos Latin mūnus Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *n̥- Latin in- Proto-Indo-European *-is Proto-Indo-European *-h2 Proto-Indo-European *-ih2der.? Proto-Italic *-is Latin -is Latin in- -is Latin immūnisder. Middle French immunbor. Middle English English immune Ancient Greek -ο- (-o-)der. Latin -o-bor. English -o- English immuno- English assay English immunoassay English radioimmunoassay From radio- + immunoassay.