AZD2281
Azedra
AZD6244
Azoospermia
AZQ
Azygos vein
Azoxymethane
AZT
AC-T regimen
Acolbifene hydrochloride
AC-Taxol regimen
Acneiform rash
Acid-base equilibrium
Acid-base balance
Acid
Acquired thrombotic thrombocytopenic purpura
Acridine carboxamide
Acromegaly
AC-T
Acrylonitrile 

Antagonist

Meaning of 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.

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