antagonist

  1. someone who offers opposition
  2. a muscle that relaxes while another contracts
  3. a drug that neutralizes or counteracts the effects of another drug

Antagonist

An antagonist (from Greek ἀνταγωνιστής - antagonistēs , `opponent, competitor, enemy, rival`, from anti- `against` + agonizesthai `to contend for a prize,`) is a character, group of characters, or institution that represents the opposition against which the protagonist or protagonists must contend. In other words, an antagonist...
Found on http://en.wikipedia.org/wiki/Antagonist

Antagonist

An antagonist is a drug or a compound that opposes the physiological effects of another. At the receptor level, it is a chemical entity that opposes the receptor-associated responses normally induced by another bioactive agent.
Found on http://www.chem.qmul.ac.uk/iupac/medchem/ah.html

antagonist

(an-tag´ә-nist) antagonistic muscle. a substance that tends to nullify the action of another, as a drug that binds to a cellular receptor for a hormone, neurotransmitter, or another drug blocking the action of that substance without producing any physiologic effect itself. See also blocking agent.&nb...
Found on http://www.encyclo.co.uk/local/21001

antagonist

(an-tag;uo-nist) A muscle that acts in opposition to another muscle.
Found on http://www.mhhe.com/biosci/abio/glossary.mhtml

antagonist

(from the article `plant disease`) Biological control of plant diseases involves the use of organisms other than humans to reduce or prevent infection by a pathogen. These organisms ...
Found on http://www.britannica.com/eb/a-z/a/80

antagonist

(Gr. antagonists an opponent) a substance that tends to nullify the action of another, as a drug that binds to a cell receptor without eliciting a biological response.
Found on http://users.ugent.be/~rvdstich/eugloss/DIC/dictio06.html

antagonist

[n] - a muscle that relaxes while another contracts 2. [n] - a drug that neutralizes or counteracts the effects of another drug
Found on http://www.webdictionary.co.uk/definition.php?query=antagonist

Antagonist

• (a.) Antagonistic; opposing; counteracting; as, antagonist schools of philosophy. • (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.) One who contends with another, especially in combat; an adversary; an opponent. • (n.) A medicine whi...
Found on http://thinkexist.com/dictionary/meaning/antagonist/

antagonist

<pharmacology> A substance that tends to nullify the action of another, as a drug that binds to a cell receptor without eliciting a biological response. ... Origin: Gr. Antagonistes = an opponent ... (18 Nov 1997) ...
Found on http://www.encyclo.co.uk/local/20973

antagonist

noun a muscle that relaxes while another contracts; `when bending the elbow the triceps are the antagonist`
Found on https://www.encyclo.co.uk/local/20974

Antagonist

An·tag'o·nist noun [ Latin antagonista , Greek ...; ... against + ... combatant, champion, from ...: confer French antagoniste . See Antagonism .] 1. One who contends with another, especially in combat; an adversary; an opponent. « Antagonist of Heaven's Alm...
Found on http://www.encyclo.co.uk/webster/A/90

Antagonist

1.) A drug or other molecule that blocks receptors. Antagonists inhibit the effects of agonists.2.) A muscle that moves a joint in opposition to an intended direction.
Found on http://www.brainfacts.org/glossary

antagonist

a structure that opposes or counteracts another structure.
Found on http://www.1stdentalcare.com/glossary.shtml

Antagonist

A character or force against which another character struggles. Creon is Antigone's antagonist in Sophocles' play Antigone; Teiresias is the antagonist of Oedipus in Sophocles' Oedipus the King.
Found on http://highered.mheducation.com/sites/0072405228/student_view0/drama_glossa

Antagonist

A drug or other molecule that blocks receptors. Antagonists inhibit the effects of agonists.
Found on http://www.bbc.co.uk/radio4/reith2003/glossary.shtml

Antagonist

A drug that binds with a receptor but does not exert an effect and can stop an agonist from binding to the same receptor, can bind reversibly or irreversibly.
Found on http://www.cat-world.com.au/glossary

antagonist

A drug which when attached to a receptor blocks the receptor from being stimulated by an agonist drug.
Found on http://www.vetmed.wsu.edu/glossary/glossary.asp

Antagonist

A molecule that blocks the ability of a given chemical to bind to its receptor, preventing a biological response.
Found on http://www.combichemistry.com/medical-chemistry-glossary.html

Antagonist

A molecule that blocks the activation of a receptor.
Found on http://www.drugdesign.com/web/teaching/glossary

Antagonist

A muscle that relaxes while another contracts; 'when bending the elbow the triceps are the antagonist'
Found on http://www.dwp.gov.uk/medical/med_conditions/glossary.html

Antagonist

a structure that opposes or counteracts another structure.
Found on http://www.cosmeticdentistryguide.co.uk/glossary.html

Antagonist

A substance capable of binding to a molecular target to neutralise or counteract a physiological reaction.
Found on http://www.astrazeneca.com/about-us/glossary/?letter=A

Antagonist

A substance which reduces or prevents the effect of an agonist at a receptor site.
Found on http://www.vernalis.com/component/content/article/101-placing-and-open-offe

antagonist

An agent or substance that counteracts the action of another.
Found on http://ppathw3.cals.cornell.edu/glossary/Defs_A.htm
No exact match found