Noun cardiograph has 2 senses
  1. cardiograph, electrocardiograph - medical instrument that records electric currents associated with contractions of the heart
    --1 is a kind of medical instrument
    --1 is a part of cardiac monitor, heart monitor
  2. ballistocardiograph, cardiograph - 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
    --2 is a kind of medical instrument
    --2 is a part of cardiac monitor, heart monitor
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