epi
n. countable C1 Advanced epi
n. a medical tool used to quickly inject medicine during a dangerous allergic reaction. It is a short name for an epinephrine autoinjector.
n. an autoinjector device used for the emergency administration of epinephrine to treat anaphylaxis. Informal clipping of 'epinephrine autoinjector'.
He always carries an epi in case he eats peanuts by mistake.
The school nurse keeps an epi in the first-aid kit to treat students with severe bee-sting allergies.
While the brand name is widely known, many patients simply refer to their life-saving medication as an epi when discussing emergency protocols with their healthcare providers.
Usage
Commonly used in medical and domestic contexts as a shorthand for the full device name.