agonist(redirected from beta-2 agonist)
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1. Physiology A contracting muscle that is resisted or counteracted by another muscle, the antagonist.
2. A substance that can combine with a receptor on a cell to initiate signal transduction.
3. One involved in a struggle or competition.
[Late Latin agōnista, contender, from Greek agōnistēs, from agōn, contest; see agony.]
1. (Physiology) any muscle that is opposed in action by another muscle. Compare antagonist2
2. a competitor, as in an agon
[C17: from Greek agōn agon]
ag•o•nist(ˈæg ə nɪst)
1. a person engaged in a contest, conflict, struggle, etc., esp. the protagonist in a literary work.
2. a person who is torn by inner conflict.
3. a contracting muscle whose action is opposed by another muscle. Compare antagonist (def. 3).
4. a chemical substance capable of activating a receptor to induce a full or partial pharmacological response. Compare antagonist (def. 5).
A muscle that actively contracts to produce a desired movement. Compare antagonist.
one who contends for a prize in public games. — agonistic, agonistical, adj.See also: Athletics
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|Noun||1.||agonist - the principal character in a work of fiction|
antihero - a protagonist who lacks the characteristics that would make him a hero (or her a heroine)
|2.||agonist - someone involved in a contest or battle (as in an agon)|
contestant - a person who participates in competitions
|3.||agonist - a muscle that contracts while another relaxes; "when bending the elbow the biceps are the agonist"|
antagonistic muscle - (physiology) a muscle that opposes the action of another; "the biceps and triceps are antagonistic muscles"
|4.||agonist - (biochemistry) a drug that can combine with a receptor on a cell to produce a physiological reaction|
drug - a substance that is used as a medicine or narcotic
biochemistry - the organic chemistry of compounds and processes occurring in organisms; the effort to understand biology within the context of chemistry