- epinephrine (def. 1).
- the feeling of excitement, alertness, and intensity caused by the release of epinephrine in the body:For adventure seekers, there are ungroomed, off-piste routes with deep snow offering lots and lots of adrenaline.
- a hormone that is secreted by the adrenal medulla in response to stress and increases heart rate, pulse rate, and blood pressure, and raises the blood levels of glucose and lipids. It is extracted from animals or synthesized for such medical uses as the treatment of asthma. Chemical name: aminohydroxyphenylpropionic acid; formula: C 9 H 13 NO 3
