[mass noun](Physiology)the phase of the heartbeat when the heart muscle relaxes and allows the chambers to fill with blood (生理)(心脏的)舒张;舒张期。 常与 systole 相对
派生 diastolic adjective 语源
late 16th cent.: via late Latin from Greek, separation, expansion', from diastellein, from dia 'apart' + stellein 'to place'