Biologically Active Substance
agonist Audio
ag·o·nist [ ag-uh-nist ]
Definitions related to agonist:
  • (receptor agonist) A class of substances that binds to and activates a receptor and induces a biological response.
    CDISC Terminology
    Clinical Data Interchange Standards Consortium (CDISC), 2021
  • 1) A substance that triggers a physiological response when it combines with a receptor. 2) A muscle whose contraction is opposed by another muscle.
    Harvard Dictionary of Health Terms
    Harvard Medical Publishing, 2011
  • A drug or substance that binds to a receptor inside a cell or on its surface and causes the same action as the substance that normally binds to the receptor.
    NCI Dictionary of Cancer Terms
    U.S. National Cancer Institute, 2021
  • An agent that has affinity for a receptor and intrinsic activity at that receptor.
    NCI
    U.S. National Cancer Institute, 2021
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.