diastole

noun3

1. •
   The phase or process of relaxation and dilation of the heart chambers, between contractions, during which they fill with blood; an instance of the process.

   • In patients with rapid rates, diastole may be sufficiently shortened that the third and fourth heart sounds become superimposed and form a summation gallop. — 2005
2. •
   (rhetoric) The lengthening of a vowel or syllable beyond its typical length.

   • I have inserted diastole which is omitted in Putschius, an insertion which both the complement, and the subsequent text make necessary. — 1815
3. •
   The hypodiastole, a textual or punctuation mark formerly used to disambiguate homonyms in Greek.