noun
a hormone secreted by the adrenal glands that helps the body respond to stress and danger
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Adrenin, also known as epinephrine, is a hormone and neurotransmitter that plays a key role in the body's fight or flight response.
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I need a shot of adrenin to get through this tough workout.
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I felt a rush of adrenin when I saw my favorite band perform live.
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Her excitement was like a surge of adrenin, propelling her to take risks and try new things.