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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.
(Physiology) the dilatation of the chambers of the heart that follows each contraction, during which they refill with blood. Compare systole
[C16: via Late Latin from Greek: an expansion, from diastellein to expand, from dia- + stellein to place, bring together, make ready]
di•as•to•le(daɪˈæs tlˌi, -tl i)
the normal rhythmical dilatation of the heart during which the chambers are filling with blood. Compare systole (def. 1).
[1570–80; < Late Latin diastolē < Greek diastolḗ a putting asunder]
di`as•tol′ic (-əˈstɒl ɪk) adj.
The period during the normal beating of the heart in which relaxation occurs and the heart's chambers fill with blood. Compare systole.
(in Greek and Latin verse) the lengthening of a short syllable. Cf. systole. — diastolic, adj.See also: Verse
the rhythmic dilatation of the heart during which the muscle relaxes and the chambers fill with blood. Cf. systole. — diastolic, adj.See also: Heart
The interval between two of the heart’s contractions as it supplies blood to the body. Compare systole.