D defs.my
Entry 1 sense Webster, 1913

Perisystole

· Per·i·sys·to·le · IPA
01 n. The interval between the diastole and systole of the heart. It is perceptible only in the dying.
  1. 1.
    The interval between the diastole and systole of the heart. It is perceptible only in the dying.(Physiol.)