Agonist
WordNet
noun
(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
WiktionaryText
Etymology
From
Noun
- Someone involved in a contest or battle (as in an agon).
- A muscle that contracts while another relaxes.
- "when bending the elbow the biceps are the agonist"
- 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"