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