Tag life-saving device

Equipment & Supplies

Defibrillator

Defibrillator is the broader term for a device used to deliver a shock during certain cardiac emergencies. Learn what it means and where to find the main AED page.

First Aid Glossary Editorial Team
February 9, 2026

Equipment & Supplies

Automated External Defibrillator

An automated external defibrillator, or AED, is a device used during cardiac arrest. Learn what it does, when it is used, and how it fits with CPR.

First Aid Glossary Editorial Team
February 7, 2026