Definition of Antagonist

Babylon English
antagonist
n. adversary, opponent; one who opposes; (Pharmacology, Medicine) drug or substance that acts against or annuls the effect of another substance

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Antagonist definition was found in categories: Language, Idioms & Slang(3)  Medicine(3)  Sports(1)  Encyclopedia(1)  

Antagonist Definition from Language, Idioms & Slang Dictionaries & Glossaries

Webster's Revised Unabridged Dictionary (1913)
Antagonist
(n.)
One who contends with another, especially in combat; an adversary; an opponent.
  
(n.)
A muscle which acts in opposition to another; as a flexor, which bends a part, is the antagonist of an extensor, which extends it.
  
(n.)
A medicine which opposes the action of another medicine or of a poison when absorbed into the blood or tissues.
  
(a.)
Antagonistic; opposing; counteracting; as, antagonist schools of philosophy.
  

WordNet 2.0
antagonist

Noun
1. someone who offers opposition
(synonym) adversary, opponent, opposer, resister
(antonym) agonist
(hypernym) person, individual, someone, somebody, mortal, human, soul
(hyponym) dueler, dueller, duelist, duellist
2. a muscle that relaxes while another contracts; "when bending the elbow the triceps are the antagonist"
(hypernym) antagonistic muscle
3. a drug that neutralizes or counteracts the effects of another drug
(antonym) synergist
(hypernym) drug
(hyponym) estrogen antagonist, tamoxifen

hEnglish - advanced version
antagonist

antagonist
\an*tag"o*nist\ (&?;), n. [l. antagonista, gr. &?;; &?; against + &?; combatant, champion, fr. &?;: cf. f. antagoniste. see antagonism.]
1. one who contends with another, especially in combat; an adversary; an opponent. antagonist of heaven's almigthy king. our antagonists in these controversies.
2. (anat.) a muscle which acts in opposition to another; as a flexor, which bends a part, is the antagonist of an extensor, which extends it.
3. (med.) a medicine which opposes the action of another medicine or of a poison when absorbed into the blood or tissues.


  similar words(1) 




 estrogen antagonist 


Antagonist Definition from Medicine Dictionaries & Glossaries

NCI Dictionary of Cancer Terms
antagonist
In medicine, a substance that stops the action or effect of another substance. For example, a drug that blocks the stimulating effect of estrogen on a tumor cell is called an estrogen receptor antagonist. 

Aids Glossary
antagonist
a drug that counteracts or neutralizes another drug.

Diabetes Glossary
Antagonist
One agent that opposes or fights the action of another. For example, insulin lowers the level of glucose in the blood and glucagon raises it; therefore, insulin and glucagon are antagonists.


Antagonist Definition from Sports Dictionaries & Glossaries

Bodybuilding Jargon
antagonist
a muscle or a muscle group that counteracts the contraction of another muscle or muscle group. See also agonist


Antagonist Definition from Encyclopedia Dictionaries & Glossaries

Wikipedia English - The Free Encyclopedia
Antagonist
In literature, the antagonist is that against which the main character or protagonist contends. An antagonist is often a Villain, but may be a force of nature, set of circumstances, an animal, or other force that is in conflict with the protaganist.

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