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Pronunciation: ag′on-ist


  1. Denoting a muscle in a state of contraction, with reference to its opposing muscle, or antagonist.
  2. A drug capable of combining with receptors to initiate drug actions; it possesses affinity and intrinsic activity.

[G. agōn, a contest]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.