/ Thesaurus / I Synonyms of immunochemical assay Find synonyms for: Noun1. immunoassay, immunochemical assay, bioassay, bio-assayusage: identification of a substance (especially a protein) by its action as an antigen; "PSA in the blood can be measured with an immunochemical assay"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language