# immunoassay

> English word · Noun · frequency rank #93,824

## Definitions
1. A test for the presence of a substance using the reaction of an antibody to its antigen, making use of the high selectivity of components of biological immune systems.

## Etymology
From immuno- + assay.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/immunoassay