adren·a·line or chiefly Brit adren·a·lin 
/əˈdrɛnələn/ noun
/əˈdrɛnələn/ noun [noncount] : a substance that is released in the body of a person who is feeling a strong emotion (such as excitement, fear, or anger) and that causes the heart to beat faster and gives the person more energy
▪ It was a thrilling experience that really got our adrenaline going. [=got us very excited] ◊If you experience a rush of adrenaline or an adrenaline rush, you feel very excited and full of energy.
▪ I felt a rush of adrenaline as I walked onto the stage.
▪ It was a thrilling experience that really got our adrenaline going. [=got us very excited] ◊If you experience a rush of adrenaline or an adrenaline rush, you feel very excited and full of energy.
▪ I felt a rush of adrenaline as I walked onto the stage.
