diastole
Pronunciation: /dʌɪˈastəli/
Definition of diastole
noun
- the phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood. Often contrasted with systole.
Origin:
late 16th century: via late Latin from Greek, 'separation, expansion', from diastellein, from dia 'apart' + stellein 'to place'