Adrenaline

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Dictionary Meaning and Definition on 'Adrenaline'

Adrenaline Meaning and Definition from WordNet (r) 2.0
    adrenaline n : a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action [syn: epinephrine, epinephrin, Adrenalin]
Adrenaline Meaning and Definition from Webster's Revised Unabridged Dictionary (1913)
    Adrenaline \Ad*re"nal*ine\, n. Also Adrenalin \Ad*re"nal*in\ (Physiol. Chem.) A crystalline substance, C9H13O3N, obtained from suprarenal extract, of which it is regarded as the active principle. It is used in medicine as a stimulant and hemostatic.
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Wikipedia Meaning and Definition on 'Adrenaline'


Epinephrine (also known as adrenaline) is a hormone and neurotransmitter. Chemically, epinephrine is a catecholamine, a monoamine produced only by the adrenal glands from the amino acids phenylalanine and tyrosine.

The term adrenaline is derived from the Latin roots ad- and renes and literally means on the kidney, in reference to the adrenal gland's anatomic location on the kidney. The Greek roots epi- and nephros have similar meanings, and give rise to epinephrine. The term epinephrine is often shortened to epi in medical jargon.

Adrenal extracts containing adrenaline were first obtained by Polish physiologist Napoleon Cybulski in 1895. These extracts, which he called "nadnerczyna", contained epinephrine and other catecholamines.

As a hormone, epinephrine acts on nearly all body tissues. Its actions vary by tissue type and tissue expression of adrenergic receptors. For example, epinephrine causes smooth muscle relaxation in the airways, but causes contraction of the smooth muscle that lines most arterioles.

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Adrenaline Sample Sentences in News


  • Adrenaline does little to increase patient's survival after cardiac arrest, study finds
    Giving patients adrenaline after they suffer a cardiac arrest outside of a hospital does not increase their prospects of surviving long-term, according to new research. When a person has a cardiac arrest, his or her heart stops beating. Unless the heart is restarted within minutes, the person usually dies. More than 90 per cent of people who experience a cardiac a Read more on this news related to 'Adrenaline'
  • Adrenaline does not boost long-term survival rates in heart attack patients, says study
    Giving patients adrenaline after they suffer a cardiac arrest outside of a hospital does not increase their prospects of surviving long-term, according to new research conducted at St. Michael's Hospital. Read more on this news related to 'Adrenaline'
  • Adrenaline squad rallies in tourney
    Several local fastpitch softball players helped propel the 14-and-under Oklahoma Adrenaline from a dismal start to a shining finish in a recent Tulsa tourney. Read more on this news related to 'Adrenaline'

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