Definition of adrenaline in English:

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adrenaline

Pronunciation: /əˈdrɛn(ə)lɪn/
(also adrenalin)

noun

[mass noun]
A hormone secreted by the adrenal glands that increases rates of blood circulation, breathing, and carbohydrate metabolism and prepares muscles for exertion: performing live really gets your adrenaline going Also called epinephrine.
More example sentences
  • Chemicals such as adrenaline, noradrenaline and cortisol are pumped into the bloodstream.
  • It is known that adrenalin is the hormone that frees fatty acids of the adipose tissues.
  • This is due to the liberation of the hormone adrenaline at these times.

Origin

Early 20th century: from adrenal + -ine4.

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