systole


systole
systole [sis′tə lē΄]
n.
[ModL < Gr systolē < systellein, to draw together: see SYSTALTIC]
the usual rhythmic contraction of the heart, esp. of the ventricles, following each dilatation (diastole), during which the blood is driven onward from the chambers: opposed to DIASTOLE
systolic [sis täl′ik]
adj.

English World dictionary. . 2014.