Diastole
Diastole , noun
[Latin, from Greek {not transcribed}, from {not transcribed} to put asunder, to separate; dia` through + {not transcribed} to set, to place.]
1.
(Physiology) The rhythmical expansion or dilatation of the heart and arteries; -- correlative to systole, or contraction.
2.
(Grammar) A figure by which a syllable naturally short is made long.