agonist

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ag·o·nist

(ăg′ə-nĭst)

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.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

agonist

(ˈæɡənɪst)

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]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ag•o•nist

(ˈæg ə nɪst)

n.

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).

[1620–30; < Late Latin agōnista < Greek agōnistḗs contestant =agṓn agon + -istēs -ist]

ag·o·nist

(ăg′ə-nĭst)

A muscle that actively contracts to produce a desired movement. Compare antagonist.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

agonist

one who contends for a prize in public games. — agonistic, agonistical, adj.

See also: Athletics

ThesaurusAntonymsRelated WordsSynonymsLegend:

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Noun	1.	agonist - the principal character in a work of fiction protagonist 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 adversary, antagonist, opposer, resister, opponent - someone who offers opposition
	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

Translations

agonista

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