What Is an Automated External Defibrillator? An automated external defibrillator (AED) is a portable device that checks the heart rhythm and can send an electric shock to the heart to try to restore a normal rhythm. AEDs are used to treat sudden cardiac arrest (SCA). SCA is a condition in which the heart suddenly and unexpectedly stops beating.
curl. 1  to form into coils or ringlets, as the hair. 2  to form into a spiral or curved shape; coil. 3  to adorn with, or as with, curls or ringlets. 4  to grow in or form curls or ringlets, as the hair. 5  to become curved or undulated. 6  to coil. 7  to play at the game of curling.
Dictionary entry overview: What does whirl mean? â¢ WHIRL (noun) The noun WHIRL has 4 senses: 1. confused movement 2. the shape of something rotating rapidly 3. a usually brief attempt 4. the act of rotating rapidly Familiarity information: WHIRL used as a noun is uncommon. â¢ WHIRL (verb) The verb WHIRL has 5 senses: 1. turn in a twisting or spinning motion