What does radioimmunoassay mean?

Definitions for radioimmunoassay
ˌreɪ di oʊˌɪm yə noʊˈæs eɪ, -æˈseɪ, -ɪˌmyu-ra·dioim·munoas·say

This dictionary definitions page includes all the possible meanings, example usage and translations of the word radioimmunoassay.

Princeton's WordNet

  1. radioimmunoassaynoun

    immunoassay of a substance that has been radioactively labeled


  1. radioimmunoassaynoun

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


  1. radioimmunoassay

    Radioimmunoassay is a scientific method used in research and clinical laboratories to measure the concentration of specific antigens (substances that initiate an immune response) in a solution using the principles of antibody-antigen binding and radioactive labeling. It's often used to detect hormones, drugs, tumour markers and many other substances in the body.


  1. Radioimmunoassay

    Radioimmunoassay is a very sensitive in vitro assay technique used to measure concentrations of antigens by use of antibodies. As such, it can be seen as the inverse of a radiobinding assay, which quantifies an antibody by use of corresponding antigens. Although the RIA technique is extremely sensitive and extremely specific, requiring specialized equipment, it remains the least expensive method to perform such tests. It requires special precautions and licensing, since radioactive substances are used. Today it has been supplanted by the ELISA method, where the antigen-antibody reaction is measured using colorimetric signals instead of a radioactive signal. However, because of its robustness, consistent results and low price per test, RIA methods are again becoming popular. It is generally simpler to perform than a bioassay. The RAST test is an example of radioimmunoassay. It is used to detect the causative allergen for an allergy.

U.S. National Library of Medicine

  1. Radioimmunoassay

    Classic quantitative assay for detection of antigen-antibody reactions using a radioactively labeled substance (radioligand) either directly or indirectly to measure the binding of the unlabeled substance to a specific antibody or other receptor system. Non-immunogenic substances (e.g., haptens) can be measured if coupled to larger carrier proteins (e.g., bovine gamma-globulin or human serum albumin) capable of inducing antibody formation.

Matched Categories

How to pronounce radioimmunoassay?

How to say radioimmunoassay in sign language?


  1. Chaldean Numerology

    The numerical value of radioimmunoassay in Chaldean Numerology is: 6

  2. Pythagorean Numerology

    The numerical value of radioimmunoassay in Pythagorean Numerology is: 8

Popularity rank by frequency of use



Find a translation for the radioimmunoassay definition in other languages:

Select another language:

  • - Select -
  • 简体中文 (Chinese - Simplified)
  • 繁體中文 (Chinese - Traditional)
  • Español (Spanish)
  • Esperanto (Esperanto)
  • 日本語 (Japanese)
  • Português (Portuguese)
  • Deutsch (German)
  • العربية (Arabic)
  • Français (French)
  • Русский (Russian)
  • ಕನ್ನಡ (Kannada)
  • 한국어 (Korean)
  • עברית (Hebrew)
  • Gaeilge (Irish)
  • Українська (Ukrainian)
  • اردو (Urdu)
  • Magyar (Hungarian)
  • मानक हिन्दी (Hindi)
  • Indonesia (Indonesian)
  • Italiano (Italian)
  • தமிழ் (Tamil)
  • Türkçe (Turkish)
  • తెలుగు (Telugu)
  • ภาษาไทย (Thai)
  • Tiếng Việt (Vietnamese)
  • Čeština (Czech)
  • Polski (Polish)
  • Bahasa Indonesia (Indonesian)
  • Românește (Romanian)
  • Nederlands (Dutch)
  • Ελληνικά (Greek)
  • Latinum (Latin)
  • Svenska (Swedish)
  • Dansk (Danish)
  • Suomi (Finnish)
  • فارسی (Persian)
  • ייִדיש (Yiddish)
  • հայերեն (Armenian)
  • Norsk (Norwegian)
  • English (English)

Word of the Day

Would you like us to send you a FREE new word definition delivered to your inbox daily?

Please enter your email address:


Use the citation below to add this definition to your bibliography:


"radioimmunoassay." Definitions.net. STANDS4 LLC, 2024. Web. 27 Feb. 2024. <https://www.definitions.net/definition/radioimmunoassay>.

Discuss these radioimmunoassay definitions with the community:


    Are we missing a good definition for radioimmunoassay? Don't keep it to yourself...

    Free, no signup required:

    Add to Chrome

    Get instant definitions for any word that hits you anywhere on the web!

    Free, no signup required:

    Add to Firefox

    Get instant definitions for any word that hits you anywhere on the web!

    Browse Definitions.net


    Are you a words master?

    of surpassing excellence
    • A. busy
    • B. tight
    • C. dependable
    • D. brilliant

    Nearby & related entries:

    Alternative searches for radioimmunoassay: