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1. Physiology The normal rhythmically occurring relaxation and dilatation of the heart chambers, especially the ventricles, during which they fill with blood.
2. The lengthening of a normally short syllable in Greek and Latin verse.
[Greek diastolē, dilation, separation, from diastellein, to expand : dia-, apart; see dia- + stellein, to place, send; see stel- in Indo-European roots.]
di′as·tol′ic (dī′ə-stŏl′ĭk) adj.
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|Adj.||1.||diastolic - of or relating to a diastole or happening during a diastole|