[ˈaɡənɪst], (Noun)

Definitions:
- a substance which initiates a physiological response when combined with a receptor

- a muscle whose contraction moves a part of the body directly
(e.g: there is a failure to select the right agonist muscles)



Phrases:

Origin:
early 17th century (in the sense ‘a competitor in games’): via late Latin from Greek agōnistēs ‘contestant’, from agōn ‘contest’