[ im-yuh-noh-uh-sey, -as-ey, ih-myoo- ]

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

Origin of immunoassay

First recorded in 1955–60; immuno- + assay

Other words from immunoassay

  • im·mu·no·as·say·a·ble, adjective

Words Nearby immunoassay Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use immunoassay in a sentence

British Dictionary definitions for immunoassay


/ (ˌɪmjʊnəʊˈæseɪ) /

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

Derived forms of immunoassay

  • immunoassayist, noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for immunoassay


[ ĭm′yə-nō-ăsā, ĭ-myōō′- ]

  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.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.