Definition of adrenaline in US English:


(also adrenalin)


  • 1A hormone secreted by the adrenal glands, especially in conditions of stress, increasing rates of blood circulation, breathing, and carbohydrate metabolism and preparing muscles for exertion.

    ‘performing live really gets your adrenaline going’
    Also called epinephrine
    • ‘This is due to the liberation of the hormone adrenaline at these times.’
    • ‘The familiar rush of adrenalin filled Matt's body and he took a deep breath.’
    • ‘The reason for that is that adrenalin will smooth or relax the muscles in the lungs.’
    • ‘The adrenalin and lactic acid had dulled the senses and for a moment she'd forgotten who she was and what was happening.’
    • ‘The adrenaline was circulating, surging and pumping in the heat of the moment.’
    • ‘Breathing becomes faster, blood pressure rises and adrenalin is released.’
    • ‘I felt a huge rush of adrenaline and for the first time knew I was winning.’
    • ‘This prolonged increase in adrenaline can have negative health effects on the body.’
    • ‘It is known that adrenalin is the hormone that frees fatty acids of the adipose tissues.’
    • ‘She said stressful moments were products of adrenaline and cortisone in the body.’
    • ‘The rush of adrenaline to the brain causes the flow of blood to the skin and the internal organs to slow.’
    • ‘The crew arrived several minutes later and I was able to get drugs into him, including adrenaline.’
    • ‘Chemicals such as adrenaline, noradrenaline and cortisol are pumped into the bloodstream.’
    • ‘Physical activity cuts adrenaline and produces hormones to improve your mood.’
    • ‘The adrenaline of the initial shock had worn off a bit, and I was able to take in the enormity of the event.’
    • ‘It hardly stirs the blood into a frenzy of adrenalin and expectation.’
    • ‘Vitamin C in the beans is crucial for a strong immune system and production of the stress hormone adrenalin.’
    • ‘A doctor came into the room and adrenalin flooded her system, and her heart rate went up.’
    • ‘Charged with adrenaline, I took several deep breaths and dived into the sump.’
    • ‘When you get angry your heart rate and blood pressure go up and you receive a surge of adrenaline and noradrenaline.’
    1. 1.1Adrenalintrademark The hormone epinephrine extracted from animals or prepared synthetically for medicinal purposes.


Early 20th century: from adrenal + -ine.