antagonist

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Related to antagonise: Neif

antagonist

1. any muscle that opposes the action of another
2. a drug that counteracts the effects of another drug

antagonist

[an′tag·ə‚nist]
(biochemistry)
A molecule that bears sufficient structural similarity to a second molecule to compete with that molecule for binding sites on a third molecule.
(pharmacology)
A drug or other chemical substance capable of reducing the physiological activity of another chemical substance; refers especially to a drug that opposes the action of a drug or other chemical substance on the nervous system by combining with and blocking the nerve receptor.
(physiology)
A muscle that contracts with, and limits the action of, another muscle, called an agonist, with which it is paired.
References in periodicals archive ?
As an Akita owner I am sick of the amount of times smaller dogs are permitted to run up to my dog and bark, growl and antagonise him just because he is on the lead at all times.
SIR CLIVE WOODWARD has imposed a six-month gagging order on himself in an attempt not to antagonise Southampton manager Harry Redknapp.
Sinn Fein's Eamonn McConvey claimed the decision was taken to antagonise nationalists in the mixed town.
Linking terrorism to Islamic and Muslim groups is certainly not helping and will only further antagonise our young people.
The Liverpool Walton MP and ex-defence minister said Tony Blair's government is going through a "rocky patch" and should listen to its backbenchers rather than antagonise them.
Small firms were reluctant to exercise powers to claim interest from late payers so as not to antagonise and lose customers.