defibrillator

noun Medicine/Medical.

1. an agent or device for arresting fibrillation of the atrial or ventricular muscles of the heart.

noun

1. med an apparatus for stopping fibrillation of the heart by application of an electric current to the chest wall or directly to the heart

n.

1956, agent noun from defibrillation.

n.

1. An electrical device used to counteract fibrillation of the heart muscle and restore normal heartbeat by applying a brief electric shock.