agonist
(noun)
noun
1. the principal character in a work of fiction
Similar word(s): protagonist
Definition categories: person, character
2. someone involved in a contest or battle (as in an agon)
Definition categories: person, contestant
3. a muscle that contracts while another relaxes
- when bending the elbow the biceps are the agonist
Definition categories: body
4. (biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction
Definition categories: man–made, drug
Sentences with agonist as a noun:
- "when bending the elbow the biceps are the agonist"
- "acetylcholine is an agonist at the a cholinergic receptor"