noun
a 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
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The rush of adrenaline can have a significant impact on the body's physiological response to stress.
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I love the feeling of adrenaline pumping through my veins when I go bungee jumping.
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Dude, my adrenaline was off the charts during that roller coaster ride!
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The adrenaline of competition fueled her drive to succeed in the business world.