adrenaline adrenaline /əˈdrɛnəlɪn/

noun

1. A catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action  ( Adrenalin , adrenaline , epinephrin , epinephrine )
   a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action