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|Noun||1.||antagonistic muscle - (physiology) a muscle that opposes the action of another; "the biceps and triceps are antagonistic muscles"|
agonist - a muscle that contracts while another relaxes; "when bending the elbow the biceps are the agonist"
antagonist - a muscle that relaxes while another contracts; "when bending the elbow the triceps are the antagonist"
physiology - the branch of the biological sciences dealing with the functioning of organisms
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