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| a·dren·a·line [ ə drénn'lən ] or a·dren·a·lin [ ə drénn'lən ] |
noun |
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| Definition: |
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hormone secreted by adrenal gland: a hormone secreted by the adrenal glands and by some nerve endings, that increases the speed and force of heart contraction
(
often nontechnical
)
  get the adrenaline pumping
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| [Early 20th century. <adrenal + -ine] |
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