Definition of "immunoassay" [immunoassay]

• A laboratory technique that makes use of the binding between an antigen and its homologous antibody in order to identify and quantify the specific antigen or antibody in a sample. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "By swabbing the walls with this immunoassay kit , of course!"
• "For about $80, you can get an EIA (or enzyme immunoassay), which determines whether your blood contains antibodies to hepatitis C. Doctors normally confirm a positive test result with a second antibody test called RIBA."
• "Signs were frequently up, in bright neon colors, asking for young men and women to drink alcohol and give blood for an immunoassay, drink alcohol and enter a driving simulator, drink alcohol and take a quiz."