1. Plural of epinephrine; a hormone and neurotransmitter produced by the adrenal glands that increases heart rate, blood pressure, and blood glucose levels in response to stress or danger.
Usage: Also called adrenaline, especially in British English.; Medical/scientific term.

Examples

• During the fight-or-flight response, the body releases epinephrines to prepare for action.
• Epinephrines are used in emergency medicine to treat severe allergic reactions.
• The athlete's muscles were flooded with epinephrines before the competition.
• Doctors monitor epinephrines levels in patients with certain cardiovascular conditions.
• Fear triggers the release of epinephrines into the bloodstream.