adrenaline
UK: əˈdrɛnəlɪn | US: əˈdrɛnəlɪn
n. a hormone secreted by the adrenal glands, especially in conditions of stress, increasing rates of blood circulation, breathing, and carbohydrate metabolism.
n. (informal) excitement or energy derived from stimulating or thrilling experiences.
The word "adrenaline" originates from the Latin "ad" (near) + "renes" (kidneys), referring to the adrenal glands' location atop the kidneys. The suffix "-ine" denotes it as a chemical compound. Coined in 1901 by Japanese chemist Jokichi Takamine, the term reflects its physiological source and function. The informal sense of "excitement" emerged later, metaphorically linking the hormone's physical effects to emotional intensity.
The athlete felt a surge of adrenaline as she prepared for the race.
Horror movies trigger adrenaline, making your heart race.
Doctors use adrenaline to treat severe allergic reactions.
His adrenaline kicked in when he narrowly avoided the accident.
She craves the adrenaline rush from extreme sports.