agonist

agonist definition - medical

ag·o·nist (ăgˈə-nĭst)

noun
  1. A contracting muscle that is resisted or counteracted by an antagonistic muscle.
  2. A substance that can combine with a cell receptor to produce a reaction typical for that substance.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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