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|Noun||1.||bio-assay - appraisal of the biological activity of a substance by testing its effect on an organism and comparing the result with some agreed standard|
assay - a quantitative or qualitative test of a substance (especially an ore or a drug) to determine its components; frequently used to test for the presence or concentration of infectious agents or antibodies etc.
immunoassay, immunochemical assay - identification of a substance (especially a protein) by its action as an antigen; "PSA in the blood can be measured with an immunochemical assay"
pregnancy test - a physiological test to determine whether a woman is pregnant