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English definition of “adrenalin”

adrenalin

noun [U] uk (also adrenaline)   /əˈdren.əl.ɪn/ us  
a hormone produced by the body when you are frightened, angry, or excited, which makes the heart beat faster and prepares the body to react to danger: These arguments always get my adrenalin going (= make me excited or angry).
(Definition of adrenalin from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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