antagonist

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Related to antagonistic: antagonistic effect, antagonistic muscles

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 classic literature ?
And if he were a philosopher of the eristic and antagonistic sort, I should say to him: You have my answer, and if I am wrong, your business is to take up the argument and refute me.
Nor had those antagonistic forces been dormant, which are always at work wearing down the surface of the land; the great piles of strata had been intersected by many wide valleys, and the trees now changed into silex, were exposed projecting from the volcanic soil, now changed into rock, whence formerly, in a green and budding state, they had raised their lofty heads.
In 1756 he began his career as an author with 'A Vindication of Natural Society,' a skilful satire on the philosophic writings which Bolingbroke (the friend of Swift and Pope) had put forth after his political fall and which, while nominally expressing the deistic principles of natural religion, were virtually antagonistic to all religious faith.
For during the whole time of their being together they luxuriate in telling one another their minds on whatever subject turns up; and their minds are wonderfully antagonistic, and all their opinions are downright beliefs.
Are antagonistic ideas then to be reconciled more easily--can they be cemented with blood and violence into that concord which you proclaim to be so near?
I know no medium: I never in my life have known any medium in my dealings with positive, hard characters, antagonistic to my own, between absolute submission and determined revolt.
This increase in drunkenness has led to more antagonistic behaviour from passengers, putting flight attendants at risk.
The religious leader expressed apprehension that such attacks and their timings could stir antagonistic relation among some Muslim countries.
The dominant isolates and isolates with broad-spectrum antagonistic activity were identified by 16S rRNA-based sequence analysis.
In the present study, antagonistic activity of locally isolated bio agents including five fungi and three bacteria was evaluated against Sclerotinia sclerotiorum (Lib.
Background: The antagonistic actions of anticholinesterase drugs on non-depolarizing muscle relaxants are theoretically related to the activity of acetylcholinesterase (AChE) in the neuromuscular junction (NMJ).
Duterte is likely to be less antagonistic toward Trump, even if he would continue to hold anti-American views, because the 'personal dimension' is absent, he said.