Agonist
Origin
From Ancient Greek ἀγωνιστής (agÅnistÄ“s, "combatant, champion")
Full definition of agonist
Noun
agonist
(plural agonists)- Someone involved in a contest or battle (as in an agon).
- The muscle that contracts while the other relaxes."when bending the elbow the biceps are the agonist"
- (biochemistry) A molecule that can combine with a receptor on a cell to produce a physiological reaction."acetylcholine is an agonist at the a cholinergic receptor"