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epinephrine

or ep·i·neph·rin

[ ep-uh-nef-rin, -reen ]

noun

  1. Also called adrenaline. Biochemistry. a hormone secreted by the adrenal medulla upon stimulation by the central nervous system in response to stress, as anger or fear, and acting to increase heart rate, blood pressure, cardiac output, and carbohydrate metabolism.
  2. Also Trademark, A·dren·al·in []. Pharmacology. a commercial form of this substance, extracted from the adrenal glands of sheep and cattle, or synthesized: used chiefly as a heart stimulant, to constrict the blood vessels, and to relax the bronchi in asthma.


epinephrine

/ ˌɛpɪˈnɛfrɪn; -riːn /

noun

  1. a US name for adrenaline


epinephrine

/ ĕp′ə-nĕfrĭn /

  1. A hormone that is secreted by the adrenal gland in response to physical or mental stress, as from fear, and is regulated by the autonomic nervous system. The release of epinephrine causes an increase in heart rate, blood pressure, and respiratory rate. Epinephrine also raises glucose levels in the blood for use as fuel when more alertness or greater physical effort is needed. Also called adrenaline. Chemical formula: C 9 H 13 NO 3 .


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Word History and Origins

Origin of epinephrine1

First recorded in 1895–1900; epi- + Greek nephr ( ós ) kidney + -ine 2
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Word History and Origins

Origin of epinephrine1

C19: from epi- + nephro- + -ine ²
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Compare Meanings

How does epinephrine compare to similar and commonly confused words? Explore the most common comparisons:

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Example Sentences

It can effectively lower stress hormones, including cortisol and epinephrine, while boosting endorphins.

If you find out you are allergic, carry treatment like an epinephrine auto-injector with you in scorpion country.

Anaphylaxis can be quickly reversed with medicines including epinephrine, which is what was used to treat almost all of the 21 coronavirus vaccine recipients who had severe allergic reactions.

Nineteen of the 21 people were treated with epinephrine and four were hospitalized.

Anaphylaxis, which can be life-threatening, requires emergency treatment with epinephrine.

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