n.
1.medical instrument that records electric currents associated with contractions of the heart
2.a medical instrument that measures the mechanical force of cardiac contractions and the amount of blood passing through the heart during a specified period by measuring the recoil of the body as blood is pumped from the ventricles
Idiom of the Day
stop dead
to stop very quickly or with great force
The man stopped dead when he saw the bear in the middle of the road.