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noun Adrenalin, Adrenaline n. (Physiol. Chem.) A hormone secreted by the adrenal medulla that acts as a powerful stimulant in reponse to fear or stress; it stimulates autonomic nerve action. It can be obtained as a crystalline substance, C9H13NO3. It is used in medicine as a vasoconstrictor (hemostatic) and cardiac stimulant, also to reduce allergic reactions and to stimulate the heart in cases of cardiac arrest. Synonyms: epinephrine; 3,4-dihydroxy-1-(1-hydroxy-2-(methylamino)-ethyl)benzene.
Collaborative International Dictionary of English 0.48
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