ଅର୍ଥ : The principal character in a work of fiction.
ସମକକ୍ଷ : protagonist
ଅର୍ଥ : Someone involved in a contest or battle (as in an agon).
ଅର୍ଥ : A muscle that contracts while another relaxes.
ଉଦାହରଣ :
When bending the elbow the biceps are the agonist.
ଅର୍ଥ : (biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction.