adrenaline

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noun adren·a·line \ə-ˈdre-nə-lən\

Definition of adrenaline

  1. :  epinephrine Adrenaline is used in both technical and nontechnical contexts. It is commonly used in describing the physiological symptoms (such as increased heart rate and respiration) that occur as part of the body's fight-or-flight response to stress, as when someone is in a dangerous, frightening, or highly competitive situation, as well as the feelings of heightened energy, excitement, strength, and alertness associated with those symptoms. He felt a rush of adrenaline as he parachuted from the airplane. The fans were jubilant, raucous, their adrenaline running high. — W. P. Kinsella My reputation was as a single-day racer; show me the start line and I would win on adrenaline and anger, chopping off my competitors one by one. — Lance Armstrong In figurative use, it suggests a drug that provides something with a jolt of useful energy and stimulation. London's summer antiques scene has been given a massive injection of adrenaline. — Town and Country

Recent Examples of adrenaline from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'adrenaline.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of adrenaline

see 1adrenal

Other Biochemistry Terms


ADRENALINE Defined for English Language Learners

adrenaline

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noun

Definition of adrenaline for English Language Learners

  • : a substance that is released in the body of a person who is feeling a strong emotion (such as excitement, fear, or anger) and that causes the heart to beat faster and gives the person more energy


ADRENALINE Defined for Kids

adrenaline

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noun adren·a·line \ə-ˈdre-nə-lən\

Definition of adrenaline for Students

  1. 1 :  epinephrine

  2. 2 :  excited energy Skiing gave me a rush of adrenaline.


Medical Dictionary

adrenaline

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noun adren·a·line \ə-ˈdren-əl-ən\

Medical Definition of adrenaline

  1. :  epinephrine—recognized by the British Pharmaceutical Codex as the preferred name for epinephrine in Great Britain



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