Agonist

noun

Word Frequency: 1.6

Definitions

1.nounSomeone involved in a contest or battle (as in an agon), protagonist.

2.nounThe muscle that contracts while the other relaxes.

"When bending the elbow, the biceps is the agonist."

3.nounA molecule that can combine with a receptor on a cell to produce a physiological reaction.

"Acetylcholine is an agonist at the cholinergic receptor."

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