adrenaline
n. uncountable B2 Upper Intermediate US //əˈdɹɛnəɫən// UK //ɐdɹˈɛnəlˌɪn// adren·a·line
n. a chemical your body makes when you are stressed or excited. It makes your heart beat faster and gives you extra energy.
n. a hormone released by the adrenal glands in response to stress or excitement, preparing the body for rapid physical action.
My heart raced with adrenaline after the scare.
The runner felt a surge of adrenaline as the starting gun fired.
The sudden drop in blood sugar triggered an adrenaline release, causing her hands to shake and her mind to race.
From adrenal + -ine, coined by Japanese chemist Takamine Jōkichi in 1901.