systole

systole
    n 1: the contraction of the chambers of the heart (especially
         the ventricles) to drive blood into the aorta and pulmonary
         artery
    

Systole \Sys"to*le\, n. [NL., fr. Gr. ?, fr. ? to contract; sy`n
   with + ? to set, place.]
   1. (Gram.) The shortening of the long syllable.
      [1913 Webster]

   2. (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.
      [Webster 1913 Suppl.]
    

58 Moby Thesaurus words for "systole":
      abbreviation, arsis, astriction, astringency, beat, bottleneck,
      bout, cervix, circle, circuit, circumscription, coarctation,
      compactedness, compaction, compression, compressure, concentration,
      condensation, consolidation, constriction, constringency,
      contraction, contracture, course, curtailment, cycle, decrease,
      diastole, diminuendo, downbeat, hourglass, hourglass figure,
      isthmus, knitting, narrow place, narrowing, neck, puckering, pulse,
      pursing, reduction, revolution, rotation, round, series,
      shortening, solidification, spell, stranglement, strangulation,
      striction, stricture, thesis, turn, upbeat, wasp waist, wheel,
      wrinkling