Medical Dictionary


noun epi·neph·rine

Medical Definition of EPINEPHRINE

:  a colorless crystalline feebly basic sympathomimetic hormone C9H13NO3 that is the principal blood-pressure-raising hormone secreted by the adrenal medulla, is prepared from adrenal extracts or made synthetically, and is used medicinally especially as a heart stimulant, as a vasoconstrictor (as to treat open-angle glaucoma and life-threatening allergic reactions and to prolong the effects of local anesthetics), and as a bronchodilator—called also adrenaline


epi·neph·rine also epi·neph·rin \ˌep-ə-ˈnef-rən\


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