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 ?
The emotional qualities are antagonistic to clear reasoning.
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.
There should be no secret corner of illiberality; nothing can more antagonistic than meanness to a soul which is ever longing after the whole of things both divine and human.
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.
He had hitherto taken up a cold and even antagonistic attitude to this new doctrine, and with Countess Lidia Ivanovna, who had been carried away by it, he had never argued, but by silence had assiduously parried her attempts to provoke him into argument.
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?
Manama: Four Kuwaiti relatives have attacked a doctor and a male nurse in Kuwait and the incident renewed calls for a stricter application of the law and the adoption of new ways to deal with antagonistic behaviour.
Speaking at Huawei and IDC's Ultra-Broadband Summit Middle East & Africa 2015 in Dubai yesterday, Abdin said that OTT players and telecom operators should be less antagonistic and more collaborative.
The daily quoted its source as saying, "The law stipulates a jail sentence of up to three years for anyone who, without the permission of the Kuwaiti government, engages in an antagonistic act against a foreign country that could harm bilateral political relations.
The minister has asked trade union leaders in Zambia not to be antagonistic and complaining all the time, but that they should gain good negotiating skills that would bring their members good salaries and other conditions of service.
GBR 830 is an antagonistic monoclonal antibody with first in class potential for the treatment of autoimmune diseases targeting OX40, a co-stimulatory receptor on T cells