Laboratory Procedure
bioassay Audio
bi·o·as·say [ bahy-oh-uh-sey, -as-ey ]
Subclass of:
Investigative Techniques
Definitions related to biological assay:
  • (bioassay) A laboratory test or analysis of the biological activity of a substance performed by studying its effect on an organism or in a test tube under controlled conditions.
    NCI
    U.S. National Cancer Institute, 2021
  • A method of measuring the effects of a biologically active substance using an intermediate in vivo or in vitro tissue or cell model under controlled conditions. It includes virulence studies in animal fetuses in utero, mouse convulsion bioassay of insulin, quantitation of tumor-initiator systems in mouse skin, calculation of potentiating effects of a hormonal factor in an isolated strip of contracting stomach muscle, etc.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • (bioanalytical assays) Methods for quantitative measurement of a drug, drug metabolites, or chemicals in biological fluids.
    CDISC Terminology
    Clinical Data Interchange Standards Consortium (CDISC), 2021
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