Epinephrine Definition

epənefrin, epənefrēn
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.
American Heritage Medicine
A hormone, C9H13NO3, secreted by the medulla of the adrenal gland, that stimulates the heart, increases blood sugar, muscular strength, and endurance, etc.; adrenaline: it is extracted from animal adrenals or prepared synthetically.
Webster's New World

Origin of Epinephrine

  • From Ancient Greek ἐπί (epi, “upon”) + νεφρός (nephros, “kidney”) + -ine.

    From Wiktionary

  • epi– nephr(o)– –ine

    From American Heritage Dictionary of the English Language, 5th Edition

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