Dictionary and Thesaurus

  Definition of Agonist
  1. (biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction
  2. a muscle that contracts while another relaxes; "when bending the elbow the biceps are the agonist"
  3. someone involved in a contest or battle (as in an agon)
  4. the principal character in a work of fiction
Similar Words: protagonist

 

Hyponyms: antihero

 

 
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