The Collaborative International Dictionary
Peridiastole
Peridiastole \Per`i*di*as"to*le\, n. (Physiol.) The almost inappreciable time which elapses between the systole and the diastole of the heart.
Wiktionary
peridiastole
n. (context physiology obsolete English) The almost inappreciable time which elapses between the systole and the diastole of the heart.