Part of speech: Noun
a muscle that relaxes while another contracts
Example: when bending the elbow the triceps are the antagonist
Categories: Antagonistic muscle
Part of speech: Noun
a drug that neutralizes or counteracts the effects of another drug
Categories: Drug
Opposer, Opponent, Resister, Adversary, Antagonist
The word "antagonist" comes from Ancient Greek ἀνταγωνιστής, which comes from Latin antagonista.
Many Greek words entered English through Latin translations during the Renaissance.