Laboratory Procedure
assay Audio
as·say [ as-ey, a-sey ]
Definitions related to assay:
  • A laboratory test to find and measure the amount of a specific substance.
    NCI Dictionary of Cancer Terms
    U.S. National Cancer Institute, 2021
  • A qualitative or quantitative analysis performed to determine the amount of a particular constituent in a sample or the biological or pharmacological properties of a drug.
    NCI
    U.S. National Cancer Institute, 2021
  • Tests which measure the content of the active ingredient in the drug substance or drug product. Synonymous with strength or purity which is commonly used of define the content of the active ingredient in a drug product.
    U.S. FDA Glossary
    U.S. Food & Drug Administration, 2021
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