immunochemical assay is a noun meaning "identification of a substance (especially a protein) by its action as an antigen". It carries one recorded sense.
identification of a substance (especially a protein) by its action as an antigen
“PSA in the blood can be measured with an immunochemical assay”
Definitions, synonyms and semantic relations for immunochemical assay come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.