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noun
1.
a person engaged in a contest, conflict, struggle, etc., especially the protagonist in a literary work.
2.
a person who is torn by inner conflict.
3.
Physiology. a contracting muscle whose action is opposed by another muscle. Compare antagonist (def. 3).
4.
Pharmacology. a chemical substance capable of activating a receptor to induce a full or partial pharmacological response. Compare antagonist (def. 5).
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Agonist
is always a great word to know.
So is REM sleep. Does it mean:
| pertaining to an involuntary response to a stimulus, in which the nerve impulse from a receptor is transmitted inward to a nerve center, then transmitted outward to an effector |
| a period of sleep during which most dreaming occurs as the eyes move under closed lids and the skeletal muscles are deeply relaxed |
Example Sentences
- Rescue inhalers usually contain albuterol, a short-acting beta agonist.
Collins
World English Dictionary
| agonist (ˈæɡənɪst) | |
| —n | |
| 1. | Compare antagonist any muscle that is opposed in action by another muscle |
| 2. | a competitor, as in an agon |
| [C17: from Greek agōn | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History
agonist
1914, in writings on Gk. drama, from Gk. agonistes, lit. "combatant in the games" (see agony).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary
agonist ag·o·nist (āg'ə-nĭst)
n.
A contracting muscle that is resisted or counteracted by an antagonistic muscle.
A substance that can combine with a cell receptor to produce a reaction typical for that substance.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
agonist  (āg'ə-nĭst) Pronunciation Key
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The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Word Dynamo Rating For Agonist
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