Tritagonist vs. Antagonist — What's the Difference?

In literature, the tritagonist or tertiary main character (from Ancient Greek: τριταγωνιστής, tritagōnistḗs, third actor) is the third most important character of a narrative, after the protagonist and deuteragonist. In ancient Greek drama, the tritagonist was the third member of the acting troupe.

An antagonist is a character in a story who is presented as the chief foe of the protagonist.

The person who is third in importance, after the protagonist and deuteragonist, in an ancient Greek drama.

A person who actively opposes or is hostile to someone or something; an adversary

In Greek drama, the actor who played the third role (after the protagonist and deuteragonist)

A substance which interferes with or inhibits the physiological action of another

A muscle whose action counteracts that of another specified muscle.

One who opposes and contends against another; an adversary.

The principal character in opposition to the protagonist or hero of a narrative or drama.

(Physiology) A muscle that counteracts the action of another muscle, the agonist.

A drug or chemical substance that interferes with the physiological action of another, especially by combining with and blocking its receptor.

An opponent or enemy.

One who antagonizes or stirs.

(biochemistry) A chemical that binds to a receptor but does not produce a physiological response, blocking the action of agonist chemicals.

(authorship) The main character or force opposing the protagonist in a literary work or drama.

(anatomy) A muscle that acts in opposition to another.

One who contends with another, especially in combat; an adversary; an opponent.

A muscle which acts in opposition to another; as a flexor, which bends a part, is the antagonist of an extensor, which extends it.

A medicine which opposes the action of another medicine or of a poison when absorbed into the blood or tissues.

Antagonistic; opposing; counteracting; as, antagonist schools of philosophy.

Someone who offers opposition

A muscle that relaxes while another contracts;

A drug that neutralizes or counteracts the effects of another drug