Source : Webster's Revised Unabridged Dictionary (1913)

Systole \Sys"to*le\, n. (Physiol. & Biol.)
   The contraction of the heart and arteries by which the blood
   is forced onward and the circulation kept up; also, the
   contraction of a rhythmically pulsating contractile vacuole;
   -- correlative to {diastole}. -- {Sys*tol"ic}, a.

Systolic \Sys*tol"ic\, a.
   Of or pertaining to systole, or contraction; contracting;
   esp., relating to the systole of the heart; as, systolic
   murmur. --Dunglison.

Source : WordNet®

systolic
     adj : of or relating to a systole or happing during a systole