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also ep·i·neph·rin  (ĕp′ə-nĕf′rĭn)
1. A hormone secreted by the adrenal medulla that is released into the bloodstream in response to physical or mental stress, as from fear or injury. It initiates many bodily responses, including the stimulation of heart action and an increase in blood pressure, metabolic rate, and blood glucose concentration. Also called adrenaline.
2. A white to brownish crystalline compound, C9H13NO3, isolated from the adrenal glands of certain mammals or synthesized and used in medicine as a heart stimulant, vasoconstrictor, and bronchial relaxant.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.epinephrin - a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin)epinephrin - a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action
pressor, vasoconstrictive, vasoconstrictor - any agent that causes a narrowing of an opening of a blood vessel: cold or stress or nicotine or epinephrine or norepinephrine or angiotensin or vasopressin or certain drugs; maintains or increases blood pressure
endocrine, hormone, internal secretion - the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect
neurotransmitter - a neurochemical that transmits nerve impulses across a synapse
catecholamine - any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Intravenous epinephrin and cardiopulmonary resuscitation were carried out.Thenthepatientgraduallyrecovered autonomous cardiac rhythm.
If there are warning signs for anaphylaxis (angioedema, signs related with the respiratory or circulatory system, nausea, vomiting, diffuse pruritus), epinephrin should be immediately administered.
It has been informed that there has been the increase in the levels of stres hormones such as epinephrin and cartisol having direct and indirect effects on the regulation of cardiovascular system of organism.