immunoassay

American  

[im-yuh-noh-uh-sey, -as-ey, ih-myoo-] / ˌɪm yə noʊ əˈseɪ, -ˈæs eɪ, ɪˌmyu- /

noun

1. any laboratory method for detecting a substance by using an antibody reactive with it.

---

immunoassay British  

/ ˌɪmjʊnəʊˈæseɪ /

noun

1. immunol a technique of identifying a substance by its ability to bind to an antibody

---

immunoassay Scientific  

/ ĭm′yə-nō-ăs′ā,ĭ-myo̅o̅′- /

1. A laboratory technique that identifies and quantifies (usually in minute amounts) a protein such as a hormone or an enzyme, based on its ability to act as an antigen or antibody in a chemical reaction.

---

Other Word Forms

• immunoassayable adjective
• immunoassayist noun

Etymology

Origin of immunoassay

First recorded in 1955–60; immuno- + assay

Example Sentences

The analysts expect management to continue highlighting uptake of innovative instruments and assays in areas like pathology and immunoassay through the year.

From The Wall Street Journal • Jan. 15, 2026

One is that the blood test used - an immunoassay - is inaccurate and should have been verified.

From BBC • Aug. 11, 2025

The team's presentation, 'Lateral flow immunoassay for therapeutic monoclonal antibody quality assurance', was ridiculed by one instructor.

From Nature • Mar. 24, 2015

"Our work shows that a full laboratory-quality immunoassay can be run on a smartphone accessory," team leader Samuel Sia, an associate professor of biomedical engineering at Columbia Engineering, said in a university news release.

From US News • Feb. 4, 2015

But a reactive immunoassay is not considered proof of an HIV infection.

From Slate • Apr. 3, 2013